The only functional langauges to gain much popularity here are OCaml and F#.<p>Haskell tends not to be a go-to choice here because it... well... there are a lot of reasons. It&#x27;s a tough language to learn compared to its competitors because it&#x27;s basically a few really awesome modern features in a massive graveyard of failed academic initiatives that are now enshrined in the lore of the language because one or two useful libraries used them.