[m3047]

I get (ab|l)users will do stupid. I appreciate the argument that WebSerial is not those other things; until it isn't and it's a victim of its own success. Now the driver maintainer at the OS level has to consider that their driver is exposed to the Internet every time an ad is served.

Maybe there should be a WebDevice which you can buy which plugs into a USB port and does all the things (for the things plugged into it) and exposes a "webdev(ice)" to the browser? There's an overengineered solution. Nonetheless in an industrial situation the things are exposed to the controller, not to the machines on the floor. [Edit: Not strictly true, they may be published as visible "tags" through various mechanisms.]

How about wifi?

There's a nasty shear layer / fault here. Don't build a house right on top of it.