Next on the play list, how many people really need more than 640k....
It amuses me how that has turned into a meme that people think is ironic because we're now arguing about whether 192,000,000k is enough. It was originally a reference to the IBM PC only supporting 640k of RAM whereas the 8086 could support a
whole megabyte of RAM. It wasn't even
that stupid a decision in 1981 when 64k was a lot of RAM - no more "stupid" than the original Mac only supporting 128k - and only became an issue because IBM managed to lock the PC world into an already obsolete late-70s PC design with a stop-gap processor lacking up-to-date memory management. It really became irrelevant as soon as PCs were able to use protected mode (or, better, just not use x86 - like the Mac).
How does that line go again...because I don't need or want it, I want you to never be able to get it...
I don't need or want a unicorn - but you're
welcome to have one provided you can find someone to create one for you.
Good luck with that.
The reason you can't have an Apple Silicon Mac with 1TB of RAM and 8
full-bandwidth PCIe slots with NVIDIA 4090 support (which not even the 2019 Mac Pro had - some slots still had to share) is that
Apple Silicon doesn't do that.
Apple Silicon is hugely successful at supporting useful and distinctive products from the iPad and Vision Pro up to the Mac Studio Ultra with only two basic die designs that
themselves are developments of mass-market iPhone core designs - and that's where Apple makes most of their (non-iPhone) money. Those applications take advantage of the all-in-one SoC, the efficiency of unified RAM and the high performance
by integrated GPU standards of the integrated GPU and absolutely
slays anything that takes advantage of the media/neural engines. It is
not designed to compete with Xeon-W - let alone Threadripper. Even the hypothetical M2 Extreme doesn't close that gap - and the mythical M3 isn't going to improve things by the required order of magnitude.
Apple
could sink a billion or so into developing a new die with ARM ISA, 128 PCIe 5 lanes and support for 2TB of external ECC RAM, maybe they could even bury the hatchet with NVIDIA (who would be
delighted to help Apple become a competitor in the ARM heavy metal market) so you could plug in a pair of 4090s... and they'd have... well, a Me Too workstation tower that performed about as well as any other system with dual 4090s and 2TB of ECC DDR5 (
if NVIDIA did a good job of writing the drivers). Of course, it would have nice, cool-running, low-power ARM processor which you'd barely notice alongside the 1kW being kicked out of those GPUs.
That's assuming that everybody was fine with not being able to run x86 code. They'd then have to recoup those development costs from a small and shrinking pool of people who need that level of power
and can't change their MacOS-based workflows to take advantage of the far wider choice of workstation-class PC hardware that is already out there
or just rent what they need in the cloud. It would cost a fortune - bear in mind that Intel can get away with charging $8000 for
just the CPU that the higher-end 2019 Mac Pro uses, and they have a far larger market over which to spread their development costs.
...so, basically, it's simply not in Apple's economic interest to sell you your unicorn. Instead, they're offering you a pony with a pointy seashell glued to its head - AKA the 2023 Mac Pro - which I agree is a bit of a silly charade. There's definitely a niche for a Mac Studio Ultra with PCIe slots - and what they're offering is a considerable improvement over a PCIe enclosure (16 PCIe 4 lanes shared with 64 lanes worth of slots c.f. typically
4 PCIe
3 lanes shared between 32 lanes-worth of slots, plus less clutter) - and I'm sure the development costs were a fraction of what it would cost to design a new die just for the MP. It still seems ridiculously expensive - but economies of scale are a big thing with electronics and I don't see these flying out of the shops (plus, they've kept the grotesquely over-engineered 2019 case). OTOH, some people would pay $7000 for a handbag, so...