Prosser demonstrating yet agin why he's the champion of Dunning-Kruger-based prognostication. The Mac Pro exists to host PCI cards, and massive amounts of mempry, That's literally its sole function.
Apple made a "Mac Pro" that didn't host PCI cards. It was a manifest failure*, and it was a failure, because it didn't host standard PCI cards. Noone outside of Apple's design department, wants a "smaller" "integrated" "sealed" "applicance" Mac Pro.
A cheaper mac pro, yes. A Mac Pro that uses non-xeon processors (threadrippers, epic or high end Core-I(x) chipsets), yes. However, there is literally no market for a Mac Pro without internal upgradability and internal reconfigurability post-purchase.
Why anyone pays attention to this clown, is beyond me.
*Which had nothing to do with the "thermal corner" PR excuse - the trashcan was a flawed design, not a flawed implementation of a good design.