USB Gen 1, Gen 2, and Gen 2x2 are generations of USB 3.x that have speeds of 5 Gbps, 10 Gbps, and 20 Gbps, respectively (regardless of the version number). USB 3.2 generations have regularly been ...

but 1998's improved USB 1.1 spec is what really got mass adoption going, thanks in part to Apple phasing out legacy, non-USB ports on new Macs going forward. USB 1.0 didn't see much success ...