[codygman]

I think that OP mistranslates "extreme functional programming" as "we never have side effects and compose functions".

Also what exactly is "extreme functional programming"? Only using functional programming paradigms and abstract data types instead of OOP paradigms and objects? Is "extreme functional programming" not taking advantage of do notation, ST monad, etc and only programming in pure functions thereby accomplishing nothing?

I think the author should have defined what he believed to be extreme OOP and extreme FP before going on such a diatribe (on mostly FP and haskell in particular, since others don't separate side effects).