Sometimes people want to charge their phone in an outlet 10 feet from their airport seat.

Sometimes people want to transmit 8k video.

It’s not physically possible to do both tasks with the same cable.

But because USB is a flexible standard, we don’t have two incompatible specs to do the same thing. So when you get out of the airport and to your meeting, you can actually plug your phone into the meeting room projector for your business presentation.