Regarding the Mac Pro. I think the addon cards are a taste of things to come. They remind me of the old Acorn Archimedes slices on the RISC PC https://en.m.wikipedia.org/wiki/Risc_PC - you could add CPUs (ARM - this is where ARM started!, x86 and DSPs).

They definitely took inspiration from that, and I think they’re going to reveal a game changer with the next Mac Pro. I suspect it’ll be similar. Imagine being able to add loads of M-spec CPU daughterboards & a few AMD ryzen ones for your virtualisation antics?