I think x86's death is one of those arbitrary dates that are continually referenced yet never come. See also: Year of the Linux Desktop, Windows 11, and The Repairable iPhone.
Try the Graviton servers on AWS. Compare r5.large to r6g.large. Way cheaper (.10 vs .166) and faster for the things I have tested (also, no hyperthreaded cores). No doubt in my mind that folks are going to be using them in cloud for sure. This isn't comparable to the stuff you listed. Not even counting the M1, which is crazy.