> I'd say I haven't use much (any?) 68k since […]

Completely going without is difficult because of ARexx.

> There is no such thing as "x64 or AMD64", it is all
> AMD64 and has been for over a decade.

Yes, for 21 years regarding the ISA and for 18 years (AMD) or 17 years (Intel), respectively, regarding the implementation :-)