Bravo, everyone on the PC side has great options now, but I feel for Mac "Professionals". Sad they just got straddled with the horrendous over priced and under performing Xeon platform. It boggles my mind why Apple would release a $6k model that will get trounced by these chips for a fraction of the price. I know the expand-ability is what you are buying into, but I imagine 90% of Mac Pro customers could care less about terrabytes of memory or a video solution that improves current vram limits. Add to all of that the gimped performance you are going to get on the Intel parts with the latest security patches.
Apple must have had an interest in going with AMD - the fact that they didn't makes me think that getting macOS ready as a productive, reliable OS on AMD CPUs isn't as trivial as we might assume. Also, is Thunderbolt even an option with AMD?