I have used Scheme and Clojure witch are both dialects of lisp a few times a months to try out ideas for ProjectEuler. Lisp, Haskell or F# or what every pure functional language you would like to use force you to translate math to code very cleanly. so when you are doing something that is very close to implementing pure math in code people still use these tools a lot.

But regarding your point is it still used at a job. Well I at least have never seen it mentioned on a job position. But some companies also specifically remove this from there job openings to not scare people.