Apple
could invest a truckload of money in developing a new ARM ISA CPU with huge PCIe and RAM capacity in direct competition with Xeon, AMD (and possibly Amazon et. al. who already have server/high-density-computing-grade ARM chips that are closer to what is needed than Apple Silicon), that could support AMDs latest and greatest GPUs, but the resulting GPU power would be no better than any other PC system stuffed with the same GPUs. So they'd have to invest
another truckload of money trying to develop a proprietary GPU that could beat AMD and NVIDIA....
and then recoup that investment from their smallest-selling Mac when their competitors have far larger established markets... and to
keep the market for that smallest-selling Mac they'd have to make their whizzy new GPU perform well on
legacy software that was optimised for AMD GPUs which limits the extent to which they could do anything radical
.
Compare that with the M2 Pro/Max range (presumably to be joined by a M2 ultra at some stage) which scales nicely from a 14" Mac Pro to a Mac Studio Ultra using just one basic die design - and while it doesn't have the GPU to match AMD's latest, what it
does do is pretty much perfect for the ultra-portable laptops that are Apple's bread and butter - especially when paired with Apple Silicon-optimised software - giving them a substantial boost over what Intel/AMD can do
in a comparable form-factor.
The Trashcan was a noble effort at producing a media creation "appliance" that could hit above its weight when using software that was optimised for using dual GPUs and maybe open up new markets. I think the 3 fundamental mistakes were:
- letting the former Mac Pro PCIe tower get too out of date and then discontinuing it, so the trashcan had to serve as a replacement for something that it wasn't.
- depending on Intel and AMD producing future chips that would work with the thermal design.
- a few years down the line, trying to replace it with the iMac Pro all in one (YMMV - but I suspect that is what actually happened, with the whole mea culpa news conference kicking off just when they'd have been showing iMac Pro prototypes to key customers/developers).
The Mac Studio/Max certainly looks like the return of the trashcan, but in rather better circumstances: (1) the 2019 Mac Pro is still available as viable solution for those who need it, (2) it's now up to Apple to produce whatever future chips they need to fit their products and (3) the iMac seems to have been put back in its proper place as a low/mid-range general purpose desktop where most users
aren't going to expand it. Also, thunderbolt is faster and more mature than it was (when the Trashcan came out there was stuff all available to plug into it).
I think Apple's best bet would be to keep the Intel Mac Pro on life support for a few years - maybe a CPU bump if/when Intel offer something better - as well as putting the last Intel-compatible version of MacOS into long-term support (it's not like Pro users with hard-to-change workflows are begging for annual OS upgrades). That leaves them free to "think different" about how the existing Apple Silicon range could scale to some radical new approach to high-end workstations - probably via some clustering system based on M2 Ultra "compute modules" linked by Thunderbolt - without trying to pretend it could be a like-for-like replacement for a traditional tower.
Worst thing they could do would be to kludge together some parody of a tower workstation using M2 tech
especially while annoying people by not bumping the Studio to M2. Better to openly sideline the Mac Pro, take the hit, and focus on what Apple Silicon was
good at rather than drawing attention to what it wasn't suitable for.