RAM yes, CPU should not waste while waiting for an async. non-blocking request.

Apache web server also crashes safely when some PHP script leaks memory, but if you have a proper VM with GC this is something of the past.

Fortunately most web systems use Java or it's copy C# at this point and that is not going to change since Erlang has a simple memory model that cannot do joint parallel tasks.

Go has no VM, WASM has no GC, rust is too slow to compile... that leaves plain C with a C++ compiler but you don't want to have that on a server because assembly seg. faults.

So on the server you have to use Java. Not EE but SE.