Will that hub or dock slow your SSDs, or even make them faster?

Original Article ↗ Hacker News Discussion ↗

Dock experiences & reliability

  • Several users report good long-term experience with CalDigit TS3+/TS4 and OWC Thunderbolt docks (multi‑year daily use, stable Ethernet, displays, and SSDs).
  • Others strongly warn against certain CalDigit models (notably TS3+), citing early deaths, flaky USB ports, and repeated warranty replacements.
  • One detailed report traces instability to Fresco Logic USB controllers on the TS3+; ports on the ASMedia controller and Thunderbolt are described as reliable.
  • Kensington and Plugable docks get positive mentions for build quality and stability. Some cheaper or brand‑new docks (including from Alogic) reportedly fail after ~1 year.

Display support & DisplayLink vs native TB

  • Some docks require DisplayLink on macOS for multiple displays; users find the software buggy and note limitations (no display until OS boots, no text console).
  • Thunderbolt docks/hubs can drive multiple displays natively on Macs, but are limited by the SoC:
    • Dual external displays only on Pro/Max chips or base M4; base M1/M2/M3 can’t be “fixed” by a dock.
  • Confusion over “3+ monitor” marketing; some devices rely on TB passthrough rather than truly independent outputs.

External NVMe performance via docks

  • Mac and PC users see high throughput from NVMe in Thunderbolt 3/4 enclosures, though usually slower than internal SSDs.
  • Some note wake‑from‑sleep quirks where NVMe volumes take seconds to minutes to remount, making them unsuitable for dotfiles/home dirs.
  • On Linux, complex PCIe bus enumeration with TB4 docks can cause variable performance and hot‑plug fragility; kernel versions and boot parameters matter.

Apple internal SSD pricing vs consumer NVMe

  • Multiple comments argue Apple’s SSD upgrades are heavily marked up (e.g., $600–$800 for 2TB) compared with high‑end consumer NVMe drives (~$130–$200 for 2TB, even 4–8TB still cheaper).
  • Debate over whether “gaming” SSDs (e.g., WD Black SN850X, Samsung 990 Pro/Evo) are a fair comparison:
    • One side: same TLC NAND tier, similar performance/endurance; Apple is simply price‑gouging.
    • Other side: trade‑offs in power, longevity, controller design, binning, and over‑provisioning make direct price comparisons imperfect; Apple may optimize differently, though no hard data is provided.
  • Consensus that Apple overcharges for storage, even if exact “fair” premium is unclear.

USB4, Thunderbolt & naming confusion

  • Strong frustration with USB naming (USB 3.2 variants, “USB4 2.0”) and the gap between technical and marketing terms.
  • Some suggest USB should effectively be replaced at the high end by Thunderbolt, which is perceived as clearer and more consistently specified.
  • Others counter that mandating TB everywhere would raise device and cable costs unnecessarily, especially for low‑speed peripherals and microcontrollers.

Cable choices, cost, and fast charging

  • A few users now default to Thunderbolt cables for anything important (data, video, power) to avoid capability confusion, accepting higher cost.
  • Others say they’ve rarely had issues with ordinary USB cables and prefer cheaper, thinner, more flexible ones for simple charging or peripherals.
  • Discussion on fast charging:
    • Some see limited value (phones charged overnight), others rely on it in time‑pressured or travel scenarios.
    • For laptops, higher‑power USB‑C/TB cables and chargers are often essential.
    • Slower charging can benefit battery longevity, but overheating is identified as the real risk factor.

Form factors & integrated storage

  • Several users wish more docks included internal NVMe slots to reduce “box clutter”; only a few Thunderbolt options (OWC, WD “game dock”, Steam Deck‑style hubs) are mentioned.
  • One long‑term report of an OWC 14‑port TB3 dock plus Samsung T7 SSD on a Mac mini notes years of trouble‑free operation, including reliable wake‑from‑sleep mounting.