It's mostly a mental barrier. Clojure isn't inherently hard, at all, it's just different. Once you get the hang of it, you can start reaping the benefits fairly

It's mostly a mental barrier. Clojure isn't inherently hard, at all, it's just different. Once you get the hang of it, you can start reaping the benefits fairly quickly. Unfortunately, most people judge difficulty in terms of familiarity, so the strangeness is off-putting even if it wouldn't be that hard for them to learn.