You mean the 3.0, 3.1 gen 1 and 3.1 gen 2 that all was changed to the same thing?

Even the 3.2 gen 1 is the same as the others IIRC and you need like 3.2 gen2 2x2 to go to even 10gbps.

I'm maybe off a little bit but the gist is there, rant off/