Comment by cmrdporcupine

My fear with something like Haskell particularly and with hiring people who really love Haskell is that you risk ending up with a certain kind of personality who fetishizes the tool over the problem.

I've been this person, and I've worked with this kind of person, and been the victim of this kind of person. They love language X, or framework Y, and are convinced that so many problems in front of them are shaped in a way that would be solved through the application of it.

They now have a hammer and they go searching for nails to hit with it.

I've been in shops that used Haskell, and it was... fine? It's I guess nice for people who enjoy writing in it -- I prefer other FP languages personally. I like nerdy things like that and used to hang out on Lambda the Ultimate or whatever. But I don't think there's any real secret powers in Haskell or most other tools. I've been burned too many times by that kind of approach.