We do have libraries for asynchronous io, and co routines, they&#x27;re just not ready yet. I absolutely agree with you that these things are useful, but the code needs to be written by someone. We&#x27;re just at the stages where these things are getting good enough to try out.<p>(And the language can&#x27;t have exactly the same stuff as Go or Erlang without adding a runtime, which is contrary to the goals of the project.)