Why doesn't Apple make a tower PC with a standard ATX motherboard, power supply, extension cards, etc, like in the old days? That's immensely more upgradable, easier to cool, and I don't believe most people expect their desktops PCs to be tiny.
My ideal Mac Studio would have an NVMe slot or two for additional internal storage, and those slots could be accessed without opening the case. But Apple won't do that, as convenient internal storage upgrades would likely lower their profits.
In many ways, the Mac Studio is the spiritual successor to the trash can Mac Pro. Apple Silicon's architecture solved the thermal problems that limited the trash can Mac Pro.
Apple wants to sell you a new system every couple of years, they don't want you to upgrade. They want you to throw it away the system completely and replace it (and they claim they are environmentally sustainable, btw) when in the PC world you would replace RAM, CPU, GPU, motherboard, maybe the SSD, but surely you can keep the power supply for decades, keep cooling fans, not talking about the chassis that could last 50 years because it's a just metal box.
They are a rip off these products, and I don't understand people that buys them.
BTW even when Apple did produce towers like Mac Pro they did so in a purposely non-standard way, such that you couldn't, for example, replace the PSU with a standard ATX one, the only standard components were really RAM, HDD, CD-ROM drive and in Intel models the CPU, and of course PCI expansion boards (sort of, because to work GPUs needed to have an Apple specific firmware in the old PowerPC models). You couldn't for example upgrade the motherboard, if you wanted to change the CPU to a new generation you also needed to buy a entirely new Mac with a new chassis, new PSU, etc even if what you had were perfectly fine.
We no longer need CD/DVD/floppy drives, storage has shrunk/moved to the cloud. The only thing that's really grown inside a pc case is the video card, and most of these ITX cases are built specifically around fitting popular cards.
Even folks primarily focused on gaming are probably thinking that a full ATX case is a lot of wasted space.
Maybe it's just me, but I think ATX full and mid towers are going the way of the dinosaur.
There's just less space, so it's harder to get things in and out. And you have a smaller cooler because there's less space, at least for air cooling.
I haven't used itx with video cards, but that's hugely constrained...
Water cooled but it does get a bit loud when I play games, silent for regular usage.
They were obsolete a decade ago, but priced out by artificially expensive "SFF PC" cases, fans, and power supplies. PC building completely transitioned to fashionable cargo cult in the late 2010's, with the rise of twitch.
Even standard ATX cases are kind of small if you want to build a full custom loop and need space for radiators, pumps, reservoirs, tubes, etc. My O11 XL is admittedly enormous, but it is under my desk and does not occupy any space that wouldn't otherwise remain unused.
As for storage, I categorically refuse to store things in the cloud. My files belong at home on my hardware, not on someone else's computer in the "cloud."
You can't upgrade the processor because it's soldered. You can't upgrade the ram because it's soldered. You can't upgrade the SSD because it's soldered / bonded to the CPU. You could maybe have some PCIe slots, but not many drivers for macOS, so what's the point?
Yes, it was different in the old days, but Apple is ever more a closed hardware architecture with few options. If you want choices, Apple is not for you.
This is the exactly reason.