Came here to say this. In Lisp, you can just compile a function, or load a file and it just works. It's not even sold as a hot feature, not the way Erlang sells it. It's just a feature.
I manage a few websites written in Lisp, and updating them is as simple as push code, recompile and it works.
I manage a few websites written in Lisp, and updating them is as simple as push code, recompile and it works.