> There's going to be video-only cables; low-voltage only cables; etc and this time everything is usb-c so you can literally only tell which ables work by testing all of the dozen cables instead of the 1-2 USB-As you have.

Whether or not this happens, it will have nothing to do with USB-C's merits as a connector. You could (theoretically) have the same mess happen with USB-A connectors as well.