Broke down and pulled the trigger on ordering parts for a new PC, It put a real dent in my Mac Pro funds. I really only upgrade every 8-10 years, however when the nMP shipped I was due and upgrade. nMP not having any real way to upgrade the parts, I didn't feel it was a good fit for me, as I can't really be locked in the same CPU and Video card for 8-10 years, plus I don't enjoy a mess of wires and external boxes just to have more than one storage drive.
I was putting some thought into the iMac Pro, I think it's a nice machine, but I like to tinker, and really need PCI-E slots.
No guarantee that the modular MacPro will fit my needs either, and I don't see why Apple needs years to design a Pro system. When new Intel Chipsets launch, other manufacturers are ready on day one, with new systems based on these chipsets.
Apple needs to quit trying to reinvent the wheel, a Pro system comes in tower form, people like me expect PCI-E slots, a socketed CPU, and lots of Ram slots.
Apple is losing sales.
So, a few thoughts:
1. Apple suffers from a myopic org structure; they can only focus on a few things really well. Even though they have a broad product offering, it's clear that the iPhones get the most love and everything else gets varying degrees of crumbs.
2. The Mac Pro is their high-end computer, sure. But it's also a trophy. Apple likes to build trophy computers that people show off on their desktops. In a world of boxy PC towers, Apple's shiny cylinder really stands out. The case is still very different and very desirable.
3. Apple suffers from a very capitalistic problem: They don't have a direct competitor. There's no one else you can go to to buy a pro-level Mac. The extreme loyalty of Apple's fan base means that Apple can practically ignore Mac users for years and not lose their business. So, where's the pressure on Apple to produce a new Mac Pro every year? It's not there. So why should they spend the money?
4. Apple is a consumer technology company with scant offerings for the enterprise. Apple has completely given up on the idea that they can compete with Dell, Microsoft, et al, in the back office and with high end desktops. Their only high end desktop is very narrowly focused on the video production crowd.
5. If I were to take a SWAG at why Apple is not upgrading the Mac Pro in particular, I suspect that the engineering cost is higher than average because there is way more customization and miniaturization going on than in a traditional desktop system. So, Apple can either rebuild the internals for an aging case, or rebuild the case as well as the internals. Or just do nothing.
I think that Apple has all but lost interest in competing on the desktop based on specs. They are just doing their own thing. They sell systems to their base. They sell systems to folks who love their iOS gadgets. They sell systems to people who love Apple's style but would never crack open a PC case to swap out a part.
Apple has a huge sunk cost in the desktop market, so they're just riding the wave. And if anything innovative happens in the desktop market, they're poised to take advantage of it. But I think Apple's Mac line are more or less sleepers at this point in their history.