As much as that would be appreciated, its no longer Apple. Those users are typically building their own hardware to hackintosh spec instead - better than nothing but still many (myself included) would rather buy such a solution from Apple themselves as you say.

If Apple still feels the need to have a system for real professionals, then it has a choice: (1) upgrade the Mac Pro on a regular basis or (2) go back to a tower system.

The Mac Pro has proven to be a bit of a disaster, because it hasn't been upgraded for more than three years and users can't usefully upgrade it themselves. A rational Apple would just go back to doing towers. (Even with a tower, you can still handle external as well as internal upgrades.)

You're right that this is hackintosh territory. However, I've seen a lot of people switch to PC towers runing Windows instead. If they spend most of their time in Adobe programs, they are still using Adobe's UI. And users can boot/dual-boot into Linux if that meets their needs.

I can't see many reasons for "creative professionals" to stick with MacOS at the moment, no matter how much they like it. Even Final Cut Pro users recognize that Adobe is the industry standard, and there are several other decent video editors for Windows.