[CentOS] AMD epyc/naples

do we know if 7.4 is good for new AMD cpus?
More specifically for virtualization. Historically there 
were some issues and things like AMD's IOMMU & similar were 
not exactly perfectly supported by HW vendors, UEFI/bios <=> 
kernel.

I'm thinking of getting one and I wonder if it might be too 
soon. I wonder if above things are at least in an acceptable 
shape of older Opteron platform, and not worse. Any experience?

b.w. L.