I've worked with 200-300 K8s customers and 30-40 openshift customers.

On K8s I typically see somewhere in the low 20s as the number of pods per node.

Openshift I'll see high 20s or low 30s as the average number of pods across most openshift customers. But we're seeing some crazy numbers for some larger enterprise customers. 100,400,2500 pods per node. This seems to be driven by the way openshift is licensing

The latter is an absolute nightmare to support, and they seem to have trouble organizing internally as well.