Comment by jasomill

This, more than ideology or security, is one of the main reasons I don't want WebUSB: fear that many hardware vendors will only support updates and configuration through a web app, that isn't guaranteed to remain online forever, may not be available to download and run locally, and may require installing otherwise undesirable firmware updates to maintain compatibility with available versions of the web app.

I have many expensive USB devices (cameras, musical instruments, audio and MIDI interfaces, a spectrometer) that are still useful despite being over a decade old; most will remain useful until the hardware fails. It'd be a shame if they required a long-lost web app to configure or control.