You gauge this be looking at complaints on the web. There are numerous posts about how JavaScript programmers <i>abuse</i> the language and don&#x27;t understand the functional nature of programming. With most of the other FP languages, you hear the odd complaint now and then, but for the most part, if people tackle FP, they get it right. The worst complaint I&#x27;ve ever heard is that Haskell&#x27;s monads are really hard to wrap one&#x27;s head around.