Not just sell units, and probably not sell (many) more units, but you can sell units at a way higher profit margin. As pretty as the new Mac Pro is and as amazing as it is as a piece of technology, I have to believe that the one-time R&D costs of the Mac Pro are huge and directly contribute to the stagnated pace of upgrades.
While the cheese-grater Mac Pros weren't nearly as slick-looking as the oversized coffee cans, Apple could effectively throw out the whole internals of the cheese graters every year or two, put a mostly generic motherboard in it, with a wholly generic GPU and completely vanilla CPU/Memory/Disks and have a whoppingly fast machine with relatively minimal R&D cost, even while upgrading it in lock-step with external (intel/Nvidia/etc) evolutions. With the coffee cans, every single upgrade will require a huge redesign at a huge expense due to the tight integration.
While I understand the benefits of and necessity of tight integration in basically every single other product that Apple sells, its antithetical to the point of a Mac Pro.
I had no issues installing updates, networking was fine etc.
What's special about iMessage/iCloud which poses an issue on a hackintosh?
I do not care what the box looks like.
Due to this, they try to innovate on form-factor, which is the aspect they have most control over the product design. The problem is that this is directly at odds with 4) price, 5) expandability and (to a certain extent) easy to 7) spec-bump every year.
So I think it's very unlikely the next MacPro will fulfill this wish-list, even if it seems rational at first.
Switching from PowerPc to Intel chips didn't seem to make them much of a difference.
1. Run macOS
2. be fast as hell
3. be quiet
4. be reasonably priced
5. be somewhat expandable on the inside with RAM and disks
6. have a variety of external ports
7. be spec-bumped at least once a year.
Do that and you'll sell units, and more importantly keep devs and creative types happy