"12 to 18 months for Apple to transition to an all-Arm lineup"
Surely not? Not for the Mac Pro? Would they really be able to develop workstation class ARM chips in such a short period of time and be willing to EOL an entirely new system that was just released? And all the PCI cards, GPU's and 3rd party stuff that can go into one, do the drivers all need to be recoded?
Seems unlikely in a short period of time. It would be upsetting to me though, I bought the 2019 MP as a long term productivity investment. If it's still not kicking ass or its being harmstrung by some sort of OS based Intel / ARM translation layer in 6 years time, then for the first time I might just reconsider the Hackintosh route. Apple would lose my trust in that matter.
When I invested in the system, i considered the price in regards to lifetime and productivity. If Apple tip that apple cart (pun intended) then the $$$ / value ratio of that system no longer works for me.