This is a great summary of what makes Clojure-the-language awesome to work with.

The REPL is way too complicated as a selling point, but it's THE concept I took from Clojure and ported it to my workflow in other languages. It has made me appreciate Hot Reloading in front end apps (and make sure it always works perfectly), make my Ruby console reload friendly, organize my React apps so business logic stays in models I can use in a REPL.