Thanks for the pointer. I should have checked, the 9900k is limited to 64GB of RAM. Coffee Lake processor and of course all the current processors have the Spectre & Meltdown issues in the processor itself.Looks like the patches were extremely minor:
In any case, probably not a good idea to get Skylake-X either at this very moment - assuming their successor is coming soon, which it is rumored to be. Same with 8700k -> 9900k. I'm waiting on this myself!
Specs of the i9 9900k processor...