Not that huge. A full copper AXP-90 X47 has been available for years. the X53 is only a little bigger and as such a pretty minor upgrade to that. Certainly nice, but not huge imo.

Im not sure why AMD didn’t bother with this, but they have in recent history had hardware/driver bugs that caused them to scrap entire features on thier GPUs.

What are some features they scrapped due to driver bugs?

I thought most motherboards support it by now. My asrock b450 at least does.

why not just get a 5800x3d and limit it manually? i cant imagine the 5700x3d will be that much cheaper anyway.