Anyone in here successfully using a pure FP language/ecosystem on their day to day?

I know of one of you that uses Scala, and myself I have an (admittedly) shitty application at work running in Clojure. These last two languages I mentioned are not pure FP.

I am talking about the likes of PureScript, Haskell, etc. Those mfkas.

If so,what is your experience working in said paradigm? I tried to keep my Clojure program as pure as possible, I failed, but enjoyed it.

And I know that FP is not a silver bullet, but in some scenarios when properly applied it can work beautifully. I also have React based applications with pure components, but Javascript itself is neither a functional(pure or otherwise) programming language, it merely supports functional paradigms.

Just wondering, no flamewars or anything like that, I just want to know your pros and cons.