[shirogane86x]

Does it? I haven't used much ocaml and I haven't used Haskell in a while, but as I remember it all IO is already non blocking in Haskell, and the async library gives you the most painless async experience I've ever seen in any ecosystem. And for OCaml, you have explicit binds but recover neat do notation with let*?

[Yoric]

You may be right. I haven't used OCaml or Haskell in a while, either. Last time I did concurrency in OCaml, there was no such thing as `let*` (you had to use Camlp4 to achieve anything like this), so it's entirely possible that the user experience has improved. As for Haskell, I mostly remember the complexity of getting anything like a reasonable error handling through the IO monad.