I think the TLDR summary is that MacOS doesn't work very well in the datacenter. The hardware is not designed for rack mounting. The OS licensing is not friendly to running VMs. I wonder if this is going to bite Apple in the long run. Building datacenters that run Linux is so much easier and cheaper. Microsoft has been trying to up their game but Apple apparently has no interest or no clue. Maybe that's fine. They are awash in money from their iPhone hardware so why should they care.

Edit: photo of goofy setup here https://www.macstadium.com/datacenters/