You can safely run the CPUs a good bit warmer than this. AMD in fact has the AM5 Zen CPUs boost all the way up to 95C. I've dialed my 7950X back a bit since I prefer keeping it below 90C, so depending on the temperature in the house and the type of WUs (MCM seems to run hotter than OPN1, which runs hotter than ARP) it's somewhere between 80 and 90C. I feel perfectly comfortable with this temperature for 24/7 operation.

A big part of the picture is the size of the CPU and the internal arrangement of its die(s). My 7950X runs at 90C at about 140W on a Noctua DH-14. By contrast, I also run an EPYC 7662 system, which runs around 65C on a smaller (92mm) Supermicro tower cooler despite running at 200W. But, it can run so much cooler because it's 8 dies inside the CPU as opposed to 2 on the 7950X. My Xeon E5 CPUs also run pretty cool despite the power draw just because they're huge dies internally too.

I wouldn't run over 80C for continuous use, but that's me. I try to keep it around 70. With my 5950x that comes out to 4ghz for 32 threads using about 120 watts continuous. Sure you can run it faster but with an exponential increase in power and heat for not that much extra gain in output.