and up to 1.4 TB in the Mac Pro
2TB theoretically using DDR4-3200 chips (8 of them). I don’t know anyone who has tried it (too costly).
I am happy with using multiple computers. I have a m4 Pro mini with 24gb ram and a M2 Air 15” - they do most things okay but the Mac Pros are the workhorse machines, they just chew through anything.