> I was rather hostile towards WebUSB/Bluetooth for ideological reasons, until I came across some cool apps […] which I would have found overkill to install a "hard App" for.

So, basically, you got seduced to loosen up your ideology a bit. You’re not alone. I likely would, too. What I would like to see instead of WebUSB is something akin to SOAP (https://en.wikipedia.org/wiki/SOAP), but for USB, where device manufacturers provide a downloadable file that describes the interface of their device, and tools, including third party ones, can generate apps from those descriptions.

I think that would give us an easy way to talk to USB devices without having to rely on the forever presence and good intentions of a third party web service.

One thing that it wouldn’t allow is for a remote server to talk to a local USB device. That may be unfortunate for a few use cases, but I think overall that’s for the better.