I haven't looked into it for a while, but AMD often supports ECC so long as the motherboard supports it. I haven't checked the current lineup, but looked at it for my last home-server build.

I agree with you entirely, to be sure. A quick Google led me to here:

https://www.reddit.com/r/Amd/comments/6f7s28/what_is_the_sta...

It's a thread that is about four months old and they are discussing ECC support with Rizen CPUs. It looks like they have some current-gen solutions.