And it's in an ugly case.
With less useful hardware (Xeon vs i7, memory quality).
It's going to not have workstation level build quality. For instance, my older mac pro has literally 1 cable run inside the case (power to the gfx card). Everything else is slotted in, and done on board. No self-built system I have is built that well.
I doubt I can get applecare on this system. So when things go wrong, I have 15ish different supplies to go through RMAs with (for better or worse).
Basically this "article" makes zero sense. It's just a link to a bunch of parts. Is it just advertising / affiliate?