> Does anybody actually work with H100s and the like?

They don't. The expectation the cloud develops in people is that magic computers just appear. They're living at a virtualized layer where all the nitty gritty of real machines going down and needing to be serviced all the time is handled by unseen minions (sorry SREs and DC staff) and cluster management and provisioning software.

The reality is that datacenters in space is mind-boggling stupid, just from the infeasibility of maintenance alone.