Indeed, but its compile times aren't much better than LLVM, at least one year ago.

Ideally we would be having the F# REPL/JIT, plus Native AOT for deployment, as comparable development workflow experience.

Naturally F# was chosen as example, because that's your area. :)

Not being negative per se, I also would like to have something like Haskell GHCi, or OCaml bytecode compiler, as options on rustup, so naturally something like this might eventually come.