All I see is an unverified tweet about some uncore errata. Nothing about what you just posted.
All chips have minor errata. No one designs chips perfectly.
That is why there are so many stepping and revisions across Intel and AMD chips.
Who knows maybe you are right. These new Ryzen chips which are already not that far behind Skylake IPC, might actually start to beat it. Good for AMD.
So since you like to infer so much crap from one tweet, where is your information that the 18 core SL-X chip will be supported on the X299 boards coming out tomorrow via a simple bios update?
Inside his own narrow minded imagination.