[gumby]

You know where this could become really valuable would be in helping people figure out which USB Type-C cable they need. Because of the proliferation of Type-C alternate modes (USB/HDMI/Displayport/Thunderbolt) and power levels, it'll will become common to use a cable that fits mechanically but doesn't function. I predict significant unhappiness!

[crooked-v]

This is a good idea, but would also take an exhaustive database of individual devices.