I am a high end user, in the sense that I would benefit greatly from fast GPUs and 28 cores.
The problem is that for high end prices, you get low or mid range performance. for $6000 I would expect higher performance and more storage than an iPad Pro.
Sorry, if you consider $6,000 “high end prices”, you are not talking about the same high end. As has been demonstrated repeatedly on here, this machine is priced similarly to other professional workstations from Dell and HP. Those, however, do not support macOS, 4 separate Thunderbolt busses, MPX Slots or the Afterburner card.
Again, you keep making it clear that this machine does not address your needs, so you should not worry about it. If your needs do not include macOS, and do include nVidia, it is possible that Apple will never address them. While I love my iPad Pro, it is not in the same league as this machine and comparing the two is meaningless. My iPad Pro does not support 10Gb/e (or any Ethernet at all, for that matter), does not support Thunderbolt, nor an
Afterburner card. That card adds more to many video workflows than either the CPU or GPU, and is a Mac Pro exclusive right now.
Maybe things will change when Apple releases a Mac Pro based on its own CPU architecture, with a different price/performance curve, but for the moment, this is a great machine for a set of users and not appropriate for other sets of users. As has always been the case, Apple does not serve all possible use cases, and while people might wish they did, it is not going to happen.