Unused RAM is wasted. If you have plenty available then doing useless memory releases (including dropping/destroying objects with RAII, which can end up doing a lot of work in case of a data structure containing other objects that have to be dropped) will just hurt your throughput. Nonetheless, Java has a pretty trivial single flag to set an appropriate heap size if you are not happy with the default.

--

You are thinking of AOT compiled, but does that AOT language support arbitrary class loading to expand functionality, live observability while taking almost zero overhead for that?

--

So what do you do if a statically linked library of yours has a vulnerability?