This could be a deal breaker.....
Was hoping for a similar experience to my 5.1, where if the system drive starts playing up (and Apple no longer sell SSD modules for the 7.1) I can clone to another volume (sata SSD or PCIe NVMe) and reboot.
Plus I wouldn't have another supported Mac to run DFU mode.
You only really NEED the second Mac to restore via DFU mode if there's an issue. Personally, I really like restoring my Apple Silicon Macs via Configurator 2. But, if there's no issue, it's not a must. Similarly, you ought to not need to do it on a T2 Mac unless there's a problem (though it's often handy to resolve minor annoyances as well). Find a friend with a USB-C MacBook, have them download Configurator 2, borrow it for 45 minutes and you're pretty much good.
I have not personally booted a 2019 Mac Pro off of a different volume running a different version of macOS, so I cannot attest to the nuances. In theory, it ought to be possible so long as you configure the Startup Security Utility to boot from external drives (as all things T2, including the T2 specific version of the Startup Security Utility treats any drive that isn't T2-controlled storage as external drives).
I would not get the 7,1 if I were you even though I have it.
Most likely they will stop macOS updates by 2024/2025...and then you have to use a hacked version of macOS to make it work and that's not a good idea for a production machine.
I would get a M1 Mac Studio if I were you (I see them in deep discounts now) and then get a 2024/2025 Mac Pro with M3/M4 if you really want the expandability.
Maybe by then we will have official ARM windows support.
1. We're probably not going to have direct booting support for Windows. The amount of work needed to get Windows 11 for ARM64 to function bare metal on Apple Silicon Mac hardware would be staggering compared to what was needed to make Windows XP-10 for x86 run on Intel Macs. "Official Support" will be in the form of Microsoft blessing things like VMware Fusion to virtualize Windows 11 for ARM64 in the way that they already did with Parallels. Windows 11 for ARM64 VMs running in either hypervisor will be much faster than the average ARM64 Windows PC anyway, especially with beefier Apple SoCs.
2. I agree that 7,1 is not a good buy for longevity of running macOS, simply because Apple has every reason to move quicker to drop Intel support now that they no longer sell new Intel Macs. I do not think that we'll see new versions not support it for at least another two years (Apple, as of Ventura, seems to be dropping Intel Macs one year at a time). And, at least for the time being, if running x86 operating systems (whether through native boot solutions like Boot Camp or through a hypervisor) alongside macOS is mission critical and/or you need things that only work on Intel and/or you NEED more than 192GB of RAM or a traditional graphics card, then 7,1 is sort of a must. But, barring those things, yeah, not exactly the best pick for macOS longevity at this point in time.
The firmware is on the Apple solid state storage modules as far as I know, so no need to worry about corrupted firmware running Windows.
That's only true of Apple Silicon Mac firmware (iBoot). Technically, the T2's iBoot is located on the modules, but that only manages bridgeOS (the T2's OS) and is not the same as the Intel Mac's UEFI implementation.
I've tried both a PCIe NVMe SSD and the built-in Apple storage as the boot drive and the Apple storage works best. You can't let the computer sleep if you use a PCIe SSD as the boot drive because it cuts power to it during sleep. I don't let it sleep now that I'm using Apple's storage for the boot drive either though.
That's super interesting insight! Seriously! Thanks for that!
Also consider, if it matters to you, that the Mac Pro will always impress people if they see it. The Studio is a boring little box probably nobody will notice. AppleCare+ is also less expensive for the Studio, because there isn't much to it.
Eh...practicality ought to take precedence here. If you need PCIe slots, Mac Pro, all the way. If you can get along fine without them and/or are fine with what an M2 Ultra Mac Studio provides, then there's no real practical benefit to buying a Mac Pro.
Though, I've started to hear more buzz about...the buzzing noise that some of them have. Hopefully they've rectified that with the M2 Max/Ultra models.