> Obviously no one would ever run something like this 1 vm per request thing irl.

I can see plenty of use-cases for doing just that. Large uploads, time-consuming request/responses such as server-side data processing, RPC, as a backend behind a caching front-end so that it only has to respond to invalidated cache entries, etc.

I don't see many people using this to actually serve general website requests though. It'd probably be modified to serve multiple requests until nothing is left to do and then exit.