I have used Ruby, Python and Node. Built Angular and React apps using Typescript, Coffeescript, Babel. I haven't tried Elixir, but I tried Clojure. It took me sometime to learn the ways of Clojure but now I feel nothing can make me more productive. I simply cannot even think about going back to writing imperative/OOP code and working with no REPL. Clojure makes sense to me today, but if for some reason it stops making sense I honestly can't think of an alternative.