> It seems like switching to arm would be a much bigger efficiency gain That's a false dichotomy. More energy-efficient CPUs don't preclude efficiencies from c

> It seems like switching to arm would be a much bigger efficiency gain That's a false dichotomy. More energy-efficient CPUs don't preclude efficiencies from cooling. I suppose the case could be made that CPUs account for the vast majority of datacenter cooling needs and that ARM efficiencies would eliminate so much of that need that any efficiences in the cooling itself would not be worth anywhere near this kind of cost. I'd expect some pretty extraordinary evidence backing up that argument, since those would be pretty extraordinary claims.