Haskell isn't the only language around with complex type systems.
However, it is actually a good example regarding tooling, as the Haskell ecosystem has interpreters and REPL environments available, for quick development and prototyping, something that is yet to be common among Rustaceans.
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.
However, it is actually a good example regarding tooling, as the Haskell ecosystem has interpreters and REPL environments available, for quick development and prototyping, something that is yet to be common among Rustaceans.