I think you're underselling the tool for beginners like myself - it's not just a ClojureScript REPL, it's actually an executable which can run node.js scripts written in clojurescript.
For example, here's the typical node http server example: https://gist.github.com/anonymous/c14b2b57184c650d9f3ff0a9e1...
You can run it with lumo test.cljs