With a modern CPUs hitting 400W it's already a problem to fill a rack top down with servers like you could do before: too many heat to dissipate and transfer, too much power to provide in the first place.

Just imagine something like 2S 9565 in at least 2U machines: with 10 server x 2U x 2 CPU you would have 8kW in the processors alone and you didn't even fill half of the 42U rack.

https://www.amd.com/en/products/processors/server/epyc/9005-...