But then you wouldn't be able to label-engineer your old chips into "the latest version" (of the old feature subset).

Isn't "USB 3.1 Gen 2" the usb 2 performance level as (re)specified in the USB 3.1 document set?

I'm deliberately writing without involving a search engine, to make my reply an authentic sample of the resulting confusion. My memory is probably wrong - and if it isn't, the lack of confidence still serves the purpose of illustrating the confusion.