The USB protocols over the wire are generally not compatible between versions, especially at the lowest levels (signalling). That's the definition of how more bandwidth can be squeezed into the same wires. The signalling layer changed between versions.
The "end-user experience" IPv6 equivalent of the USB version transition is that a person browsing to "www.google.com" has no clue whatsoever that it actually went via IPv6 instead of IPv4.
Just like with USB 1 to 4, IPv6 goes down the same cables and works the same at the application layer. Some changes occurred, but changes are mandatory for things to change.
You're asking for USB 4 to be magically "the same" as USB 1.0 while sending tens of gigabits over the wires -- not for the end users -- but for the lazy electrical engineers that can't be bothered to update their designs!
The "end-user experience" IPv6 equivalent of the USB version transition is that a person browsing to "www.google.com" has no clue whatsoever that it actually went via IPv6 instead of IPv4.
Just like with USB 1 to 4, IPv6 goes down the same cables and works the same at the application layer. Some changes occurred, but changes are mandatory for things to change.
You're asking for USB 4 to be magically "the same" as USB 1.0 while sending tens of gigabits over the wires -- not for the end users -- but for the lazy electrical engineers that can't be bothered to update their designs!