Functional programming beyond Haskell

We have all learned functional programming in Haskell, but there are more functional languages like Lisp, Scheme, ML, and Clean.

Why should we even bother to look further than Haskell?

- You want your programs to run faster.
- Monads drive you mad (what are they anyway? warm fuzzy things?).
- You need objects.
- You sometimes need a more powerful module system.

http://www.cs.uu.nl/wiki/pub/Stc/BeyondFunctionalProgrammingInHaskell:AnIntroductionToOCaml/ocaml.pdf

>>36
That's not a safety issue. There are a lot of things in Haskell that are incomparable.

>>37
Haskell Curry used it. Without combinatory logic the Haskell type system doesn't even work. Combinators are used all the time in Haskell, MLs, Lisp and even shit like Javascript.

A form of Peano numbers are used in miniKanren and probably core.logic.