Let's please not (or at most, add a scary warning for non-tagged devices), as this would break the use case for at least all retrocomputing.

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ACCount37 3 hours ago | parent [-]

Aren't most retrocomputing USB devices running open source firmware? Adding a descriptor "WebUSB supported" is a few commits and a firmware update away.

	▲	oofdere 2 hours ago \| parent \| next [-]
		that's not going to work for use cases like the https://webmd.pro where you're interfacing with hardware from other manufacturers
	▲	lxgr an hour ago \| parent \| prev [-]
		Definitely not most MiniDisc players. I doubt mine even has updatable firmware! This probably applies to many older (or even newer) USB devices as well.