> The latter exists for matrix compute, but only in the latest version of AVX which has yet to reach consumer CPUs.

As far as I am aware, AMD implemented has implemented many parts of AVX-512 in their consumer CPUs since Zen 4:

https://en.wikipedia.org/w/index.php?title=AVX-512&oldid=133...

On the other hand, Intel still does not support AVX-512 in Raptor Lake, Meteor Lake and Arrow Lake:

> https://en.wikipedia.org/wiki/Raptor_Lake

> https://en.wikipedia.org/wiki/Meteor_Lake

> https://en.wikipedia.org/wiki/Arrow_Lake_(microprocessor)