Apple seems to be avoiding building server hardware for some reason. It seems like a big opportunity, besides AI, the power efficiency of their chips would surely be attractive for datacentres. I think momentum is building for moving away from x86.
Most Macs (both Intel and Apple Silicon) refuse to thermal-throttle until they reach the junction temp.
Both you and the parent can be correct, here; many Macs are quite cool at idle, but also throttle much slower than equivalent Intel or AMD chips under load.