What kind of “everyday” server stuff is efficiently making use of ≈300 cores? It’s clearly some set of tasks that can be done independently of one another, but do you know more specifically what kind of things people need this many cores on a server for?
Traditionally VMs would be the use case, but these days, at least in the Linux/cloud world, it’s mainly containers. Containers, and the whole ecosystem that is built around them (such as Kubernetes/OpenShift etc) simply eat up those cores, as they’re designed to scale horizontally and dynamically. See: kubernetes.io/docs/…/horizontal-pod-autoscale
Normally, you’d run a cluster of multiple servers to host such workloads, but imagine if all those resources were available on one physical hosts - it’d be a lot more effecient, since at the very least, you’d be avoiding all that network overhead and delays. Of course, you’d still have at least a two node cluster for HA, but the efficiency of a high-end node still rules.