Although in the author's case, he seems to be waiting on a BIOS fix because the microcode fix doesn't actually work.
That's as well my understanding of the situation => does anybody have more infos?
I was really about to upgrade from an i7-8700 to a Ryzen 3700X but after reading this I froze and now I feel totally insecure... .
EDIT: was answered by "iforgotpassword"