His issue is precisely with things like the IO monad. At least that's how I parse this sentence: "what's often a tremendous puzzle in Erlang (or Haskell) turns

His issue is precisely with things like the IO monad. At least that's how I parse this sentence: "what's often a tremendous puzzle in Erlang (or Haskell) turns into straightforward code in Python or Perl or even C." (http://prog21.dadgum.com/54.html http://prog21.dadgum.com/54.html) In my limited experience, the type-checking constraints in haskell make programs using monads unnecessarily hard to change. I just assumed I didn't know what I was doing; it's interesting that James Hague is agreeing with a lot more knowledge and experience.