I'll add to this - I've posted a similar thread in the MacPro forums - basically said I was forced to abandon the Mac Pro given the extreme stagnation of Apple hardware, and the lack of utility of the redesigned Mac Pro.
I've used Apple computers since the Apple I in the early 1980s and I'm truly concerned with the direction they've taken of late. Personally I have relied on Apple for all my computing needs because they have (had?) an entire ecosystem that worked together flawlessly. But with their neglect of most of their hardware, and increasingly, their software, that ecosystem is ceasing to exist.
I have relied in the past on a Mac Pro for my video editing and photography professional work, an iPad for personal and some limited professional use, a MacBook Pro, personal and professional, and an iPhone. My iOS devices, an iPhone 6S+, and an iPad Air 2, I update regularly as the hardware gets regular attention from Apple. My Mac Pro? A 2009 4,1, updated as much as I possibly can with GPU, memory and hard drives - because Apple no longer makes a desktop class computer that allows hard drive, GPU and memory upgrades by the user. So I'm stuck. The MacBook Pro - I'm stuck on a 2010 model because I refuse to own a $2,000+ computer that can't be updated with hard drive and memory.
On the software side, I've truly lost trust in Apple after the debacle of Final Cut Pro X and the killing of Aperture. While I own and use FCPX for minor things and some titling, the lack of tracks and the overall UI just has never worked for me. And the discontinuation of Aperture truly felt like a betrayal. I still use it, as I'm not a fan of Lightroom, but at some point, with some Mac OS update, it's just not going to work. When Apple announced Photos, they indicated that much of Aperture would eventually be rolled into it. Well, it's been years and that's not happening. Apple seems to have lost any interest in supporting professionals who use their products.
Whether it is software or hardware, the Apple way lately seems to be to strip out functionality to simply make things appear more streamlined or attractive. Case in point - although these are only rumors thus far - are upcoming iPhones with no headphone jack and MacBook Pros with only USB-C ports. Please tell me how eliminating features adds to the user experience. I still use USB, SD card readers, HDMI out ports, etc. Every other computer company on earth still keeps these while ADDING things like USB-C. If the iPhone arrives with no headphone jack I won't be buying it. If the MacBook Pro arrives with only USB-C, I'll pass.
It is like the executive team at Apple does not live in the same world we do, and don't have anything to do with people who do. Whether these are decisions Tim Cook, Phil Schiller or Jony Ive are making, I don't know. But they need to wake up and realize their forward thinking means they are no longer in touch with the present.