I went from the Mac Pro 1,1 to the new black trashcan Mac Pro. Couldn’t be happier. But, regardless if the details are correct, Raphie does have a point. The only reason I had to get a new computer was because the newer operating systems stopped supporting the CPU chip in the old Mac Pro’s, the PowerPC chip. So yeah, there is wisdom in what he’s saying. I held out but what happened was I couldn’t use most software updates because I had to have a newer macOS but I couldn’t get that because it wouldn’t support my computer’s hardware.
I hate to say it because the pricing differences are so huge, but you’re better off buying a newer model. Unfortunately the newest mac pro lineup is from 2013, but still, it’s form factor is the one they’re still running with. You can never future proof a computer, but you can “past proof” it.