As someone that owns way too many computers, I won't debate the desire to own multiple generations of Mac Pro, especially when one is the pinnacle of the Intel era (which already entails a fair amount of computing workloads that are simply not available on an Apple Silicon Mac and likely never will be).
That all being said, you do know that this won't be "MacPro8,1", right? There literally won't be such a Mac now that Apple has moved towards a general "MacX,Y" naming scheme (starting with the Mac Studio, but continuing on with the M2 MacBook Air and the M2 13-inch MacBook Pro).
Uh...I'm pretty sure this is the dominant theory around the campfire. Far from "nobody has ever mentioned it".
In fact, it would only be logical for the Apple Silicon Mac Pro to keep in with the Intel Mac Pro in that it does not use the same class of processor as the rest of the lineup.
Furthermore, it's very clear that Apple doesn't intend to keep its desktops updated anywhere near as often as its laptops. As it stands currently, the only Mac product line to even see annual changes is the MacBook Pro. There was no new MacBook Air in 2021 and, with the exception of 2019-2021, changes to the iMac line were only happening once every other year (though, you could argue that the only real exception to this was the 2020 27-inch iMac, given that the Mac Studio was its replacement whereas the 2021 M1 iMac was not). The Mac Pro won't be an exception at all. We're going to see 3-6 years in between Mac Pro refreshes AS THE NORM.
But, much in the same way that there are people still chugging away on 2010-12 Mac Pros some 10-12 years later, the first Apple Silicon Mac Pros will definitely be apt to remain supported for the same 9 years that the 2012 and 2013 Mac Pros were. Hell, you have A9 iPhones having been dropped from iOS 16 support, yet iPadOS 16 definitely still supports the first generation 12.9" iPad Pro's A9X. Why? Because relative to A9, that particular SoC was (and still sort of is) a beast.
If you're talking dreamland, sure, that would be cool.
Back in reality, that ain't gonna happen. Apple has been very clear, since day one of them announcing the switch to Apple Silicon to begin with, that the RAM and GPUs will be integrated with the SoC. So, while Apple could toss you a bone and give you a PCIe x16 slot with a ton of bandwidth, you will never be able to put in an AMD or NVIDIA graphics card into that slot. Similarly, they might keep the MPX module convention around (seeing as MPX isn't limited to graphics cards), but you won't see graphics cards occupying those slots.
So, looking at the current Mac Pro, you won't see those RAM slots, and you won't see GPUs occupying those slots.
I don't see why a socketed SoC isn't possible. But get ready to cry at the prices of those replacement chips.
You might see 64 graphics cores on the SoC. You will not see a W7800X grace that box. Again, third party graphics are not a thing in Apple Silicon Mac land.
Not a bad topic to engage with intoxicated. I do it with my buddy all the time!
They won't. You can wake up from that particular dream right now.
We seemed to survive the PowerPC era of Power Macs just fine without ECC. Not saying that we won't want it for the Apple Silicon era of high-end Mac computing, but is it as much of a need now that we're not in Intel land and given how efficient Apple's unified memory architecture is? Not saying it wouldn't help, but is it as much of a must?
We're nearly in 2023 and you still haven't watched the video from WWDC 2020 where Apple completely debunked this:
https://developer.apple.com/videos/play/wwdc2020/10686/
Go to 1:00 in. There will be no discrete GPU in the way that we had on 15, 16, and 17 inch MacBook Pros (nor any of the PowerBook G4s that preceded them), Mac Pros, nor iMacs. The GPUs will always be on the SoC. End of story. In turn, while you can certainly make the Intel version of macOS run with third party GPUs (given that's all there were) and add/hack on drivers for ones that aren't already there, YOU CANNOT DO THIS WITH THE APPLE SILICON VERSION OF macOS!
You know that PCIe slots are useful for more than graphics cards, right? In fact, upgradeable graphics, while a big sticking point for 2013 Mac Pro and iMac Pro (2017) complainers, is far from the only reason why those customers still wanted PCIe slots. There are plenty of high-end video and audio capture cards that you're not simply slapping into a Thunderbolt 3 expansion chassis and calling a day with. THAT'S who the Mac Pro is for.
There hasn't been a Mac Pro with a base cost of $2500 in at least 9 years.
The Mac Pro will be for those that (a) need whatever faster SoC Apple has planned. If that SoC is socketed, all the better. I have no reason to believe it is, but also no reason to believe that it wouldn't be a good idea for Apple to do that (and sell aftermarket upgrades) as this is the only way users can upgrade RAM or graphics after the fact.
SSDs will probably be handled exactly the same way they are on the current Mac Pro; which is to say that the modules just contain the NAND while the SSD's controller comes from the SoC which will be cryptographically paired to the modules. Remove the modules and the data on them is useless. Upgrade the modules by doing a DFU restore of the Mac Pro (thereby rendering whatever data was on the old modules as good as gone). I'm sure Apple will throw in those same SATA ports and any other drive expansion that was present on the current Mac Pro. Nothing about Apple Silicon precludes those from existing.
Users will buy the Mac Pro over the Mac Studio for the same reason why they didn't buy the 27-inch iMac instead; they will want PCIe expansion and way higher-end options than otherwise exist. Toward that end, you're likely going to see SoCs on the high end of the Mac Pro that won't ever be in a Mac Studio.
While I don't disagree that the current Mac Pro was/is way too expensive, you have to take into account that there are fewer people that NEED this kind of Mac than was the case during the 1,1-5,1 days, or even the Power Mac G5 and Power Mac G4 days. You only really need a Mac Pro if you need (a) internal expansion and/or (b) CPU/GPU horsepower needs that exceed what you'd otherwise have in a Mac Studio or 27-inch iMac.
Again, unless you need internal expansion or seriously powerful CPU/GPU horsepower (and mind you, the M1 Max and M1 Ultra DO outperform most Mac Pro configurations in this arena), you do not need a Mac Pro. The message isn't that "This computer is no longer for you", but rather "you no longer need this class of machine because now the lesser models are adequately performant".
Most cards that you'd throw into a current Mac Pro are high-enough end to justify the cost of the machine. You're not as likely to be as casual about the PCIe cards you throw into a Mac Pro as you would be a PC you built yourself, any Power Mac, or any 2006-2012 Mac Pro tower because cards for Mac aren't designed to be casual. Most of them are high end. The days of casual Mac tower usage are over and done with thanks to the 2013-2019 gap wherein the best Xeon Macs we had were the trash can and the iMac Pro.
Uh...the iMac Pro was literally made as a stopgap for the 7,1; designed for folks that begrudgingly switched to standard 27-inch iMacs because the trash can aged without updates. The 7,1 was literally the entire point of the iMac Pro's timeline. If that's what you were trying to say, then you went about it sorta roundabout.
Depends on whether or not the M1 Ultra or some other A15 or A16 based equivalent is the basis or not. If it is, then 64GB will probably be the base model specs. If not, then 128GB as a starting RAM amount makes sense.
The maxed studio has 128GB of RAM. You're paying for a hell of a lot more than just PCIe slots by buying ANY Mac with more than 128GB of RAM in tow. Hell, consider all of the Macs that Apple has produced that have 128GB of RAM as an option. None of them were/are even remotely low-end and that has nothing to do with PCIe slots.