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A comment on USB inventor explains why the connector was not designed to be reversible. Parent comment
https://electronics.stackexchange.com/questions/73295/in-a-u...
It works for Ethernet because the transmit and receive lanes are separate, but with USB, there's only one pair used for both directions.
It chose to. They could just use different way to do it. Like, I dunno, a single packet of negotiation in slow mode...
https://electronics.stackexchange.com/questions/73295/in-a-u...
It works for Ethernet because the transmit and receive lanes are separate, but with USB, there's only one pair used for both directions.