CIRCLE WITH A DOT

@gilesgoat @brouhaha There are USB 3.x "hubs" but they are really more like switches. (And I think even USB 2.0 hubs work like switches for downstream devices that aren't High Speed.)

@gilesgoat @brouhaha A bus is usually considered as being able to connect a variable number of devices without active bridges between them. USB originally worked that way, but USB 3.x SuperSpeed signals are strictly point-to-point.

As for serial, I think the objection is that there can be multiple data signals in each direction (legacy D+/D- and 1 or 2 SS pairs per direction). But each pair is self-clocking rather than synchronous, so I would still consider this serial not parallel.