Side projects in this Ask HN thread range from hobby experiments to serious SaaS, but a few themes dominate: AI agents, developer tooling, and niche productivity apps. Many contributors are building agent harnesses, MCP tools, and LLM-backed services for coding, support, and automation, while others focus on highly specialized products like music players, personal CRMs, puzzle and strategy games, scientific tools, and privacy‑first utilities. The overall tone is one of experimentation and reinvention—often by solo or laid‑off developers—using modern AI and web stacks to scratch personal itches and explore potential businesses.
A new FCC proposal to ban foreign-made drones that include LiDAR sensors is being framed as a national security measure, but many see it as de facto protectionism aimed at Chinese manufacturers like DJI. Commenters question how much additional risk LiDAR really poses given existing satellite and camera-based mapping, and note that determined actors could still build or modify drones with off-the-shelf parts. The move is also criticized for likely saddling U.S. consumers with more expensive, less capable domestic options while doing little to close the broader technology and manufacturing gap with China.
Research suggesting taxi and ambulance drivers die of Alzheimer’s at lower rates than the general population sparked debate over what might protect the brain from the disease. Commenters weigh the role of intensive spatial navigation (like London cabbies learning “The Knowledge”), cognitive reserve, and lifestyle factors against genetics, survivorship bias, and statistical pitfalls, with many arguing that correlation doesn’t prove driving itself is protective. The conversation broadens to whether other activities—such as gaming, language learning, or living in complex urban environments—could offer similar cognitive benefits, and how GPS reliance might undermine them.
Silicon Valley’s tech elite are accused of cherry‑picking or outright misreading science fiction and political philosophy, using dystopian cautionary tales and libertarian ideas as justification for building private power centers that rival or erode democratic institutions. Commenters debate whether the real problem is individual narcissistic billionaires, structural incentives that let corporations displace state functions, or a broader cultural shift that treats technological change as synonymous with progress regardless of social harm. Others push back that government has actually expanded in size and regulation, arguing that technology is amplifying existing inequalities and governance failures rather than replacing democracy outright.
Windows 11’s built‑in Weather app is reported to use around 0.5–1 GB of RAM because it’s essentially an MSN Weather web page wrapped in Microsoft’s WebView2/Chromium framework, and it also displays ads. Commenters contrast this with native weather tools that use tens of megabytes at most, noting that even Apple’s macOS Weather app at ~250 MB is considered bloated for such a simple task. The thread broadens into criticism of modern software bloat, perverse corporate incentives, and the renewed importance of efficiency as RAM prices rise, with some users proposing lightweight alternatives or abandoning Windows entirely.
A YouTube engineer’s “supersonic trebuchet” powered only by gravity sparks fascination for its elegant mechanics and extreme efficiency, flinging a 4 g 3D‑printed projectile at roughly 776 mph. Commenters weigh its potential applications—from seed-bombing, avalanche control, and historical what-ifs to lunar mass drivers—while generally agreeing it’s more an educational, inspirational feat of engineering than a practical weapon system, with careful attention paid to safety and responsible testing.
Visions of “solid state intelligence” replacing humanity prompt comparisons between John C. Lilly’s 1970s ideas and today’s AI boom, with commenters debating whether advanced machines are more likely to coexist symbiotically with humans or render us obsolete. Many argue market incentives favor fully artificial systems over human–machine integration, raising concerns about misaligned goals, self-improving AI, and the fragility of our current socio‑economic “super-organism.” Alongside these themes, participants reflect on psychedelics, consciousness, and earlier attempts to communicate with non-human minds (like dolphins) as precursors to the challenge of understanding and aligning future machine intelligence.
A small indie developer is accused of using an AI coding assistant to clone an open‑source astronomy app—down to the name and a specific bug—while publicly framing the project as an unfairly rejected, original submission to Apple’s App Store. Commenters question the plausibility of blaming the near-identical result on an LLM, see the later “mea culpa” as a partial, self‑serving admission, and highlight how “the AI did it” is becoming a new form of responsibility dodging. The episode also feeds into broader worries about low‑effort AI-generated apps, the difficulty of verifying provenance, and opaque App Store rules for saturated categories like astrology.
Massive borrowing by big tech to fund AI data centers and chips is raising questions about who will ultimately pay for the $1–2 trillion in new debt and whether the underlying economics make sense. Commenters debate whether current AI leaders like OpenAI and Anthropic can ever recoup their capex at scale, given low conversion rates, price pressure from open‑source and Chinese models, and enterprise reluctance to add large recurring costs. Many see durable value in AI itself but argue that today’s valuations, debt structures, and “money printer” business models look bubble‑like and vulnerable to a sharp correction.
A four-year-old reMarkable 2 e-ink tablet that couldn’t update after sitting unused for years prompts wider scrutiny of how fragile “always online” devices can be, especially when basic functions depend on correct time and cloud services. Commenters highlight both official workarounds and community tools like reManager, KOReader, and SSH access that can revive and extend the device well beyond its intended use, including running custom software. The exchange broadens into a comparison of digital tablets versus pen-and-paper for note-taking, device longevity expectations, and whether reMarkable’s intentionally minimalist, creation-focused software is a strength or an unnecessary limitation.
Pervasive digital surveillance—from smartphones and connected cars to AI traffic cameras and upcoming 6G “sensing” networks—is increasingly seen as impossible to avoid, even as many people resent it. Commenters debate whether users genuinely “want” these technologies or are coerced by social, economic, and infrastructural pressures, and whether individual countermeasures (privacy tools, opting out) can meaningfully help when data brokers, corporations, and governments operate at scale. Underlying the exchange are calls for stronger regulation, clearer consent standards, and cultural shifts in how personal data and public privacy harms are understood.
New research on nitrogen dioxide exposure links gas and propane stoves to significantly higher indoor air pollution and elevated asthma risk, especially in homes that cook frequently or lack effective ventilation. Commenters weigh the health benefits of switching to electric or induction cooktops against cooking performance, control interfaces (knobs vs touch panels), and compatibility with existing cookware. The exchange also highlights concerns about building codes, energy costs, and whether ventilation hoods or outdoor-vented systems can adequately mitigate pollution from open-flame cooking.
A 2011 wager on whether a specific Long Bets URL would still serve an HTML page years later prompts a broader look at how fragile web addresses really are. Commenters examine technical risks like HTTP-to-HTTPS changes, JavaScript-heavy sites, redirects, and browser behavior, alongside social and economic factors such as hosting costs, company failures, and the difficulty of preserving content after its creators are gone. The thread also touches on related Long Bets about AI and the Turing test, highlighting how both links and predictions can quietly disappear or be gamed over time.
Illinois is advancing a law that would require operating systems to support an age‑bracket setting for user accounts and expose it via a standard, encrypted signal to apps and websites, effectively mandating built‑in parental controls. Supporters see this as a relatively privacy‑preserving way to satisfy growing political demands for child online safety and to head off more intrusive ID checks, while critics argue it shifts responsibility from large platforms to parents and open‑source developers, normalizes a gated internet, and could be leveraged for censorship or surveillance. The proposal also raises practical questions about jurisdiction over global software, how Linux and BSD systems would comply, and whether companies will retreat from markets like Illinois rather than implement the feature.
A provocative essay arguing that “incentives are for losers” has prompted debate over whether people can or should transcend externally imposed rewards and penalties. Commenters contrast systemic, incentive-based approaches to policy and work with individual moral agency, noting both the power of incentives to shape large-scale behavior and the high personal cost of resisting them. Many agree that better-designed incentives are crucial, but disagree on whether genuine morality and purpose are ultimately just another layer of incentives or something fundamentally different.
New research suggesting that nighttime melatonin impairs morning cognition in healthy young adults has prompted scrutiny of how the hormone is used as an over-the-counter sleep aid. Commenters highlight that many studies — and most U.S. supplements — use doses far above the roughly 0.3 mg the body naturally produces, which may explain reports of morning grogginess and headaches. Others note that for people with insomnia or jet lag, some cognitive dulling may be an acceptable tradeoff for better sleep, and they point to lower doses, alternative supplements, and non-pill sleep hygiene strategies as potentially safer approaches.
A new project called os8088 recreates a classic Macintosh-style graphical operating system for vintage IBM XT-era hardware, written largely in 16-bit real‑mode assembly with extensive help from large language models. Commenters are impressed that it delivers preemptive multitasking, a windowed GUI and games on such limited machines, and note parallels to historical systems like Visi On, GEOS and early Mac OS. Much of the debate centers on what it means for a hobbyist OS to be “AI‑written,” with some praising this as a showcase of modern tools and others finding it less meaningful or sustainable than painstakingly hand-coded retro software.
Turning old smartphones into always-on home servers intrigues many because the hardware is powerful, quiet, and already battery-backed, but it raises practical concerns around lithium battery safety, storage endurance, and locked bootloaders. Commenters compare this approach with more conventional low-power options like used desktops, mini PCs, and fanless router boxes, noting trade-offs in cost, power draw, reliability, and ease of running Linux or containers. A sizable side thread also unpacks how the article’s ambiguous title and language framing shaped expectations about whether a “server became a phone” or a “phone became a server.”
Cracking knuckles appears largely harmless for most people, with research suggesting the sound comes from gas changes in joint fluid rather than bones grinding or long-term damage—though forceful neck cracking is widely warned against. Commenters contrast this with higher-risk practices like aggressive chiropractic manipulation, debate the role of placebo and physical therapy, and note how medical myths and liability concerns (as with Q-tip warnings) shape the advice people receive about everyday body habits.
Shopify’s engineering post on replacing Redis with MySQL for inventory reservations prompts debate over the tradeoffs between a single transactional data store and a dual-system design using Redis for fast counters. Commenters dissect the proposed MySQL approach — one row per reservable unit with SKIP LOCKED and a capped buffer — questioning its complexity, scalability under flash-sale–style load, and whether simpler cart- or Redis-based schemes would suffice. A parallel thread criticizes the company’s heavy use of AI-generated technical content and raises concerns about Shopify’s leadership culture and politics, with some readers saying this undermines their trust in the firm’s engineering output.