The immutable persistent data structures are amazing. The STM and concurrency support are great. The interop with java is great, but is also a bit of a curse in

The immutable persistent data structures are amazing. The STM and concurrency support are great. The interop with java is great, but is also a bit of a curse in that there's a bit too much reliance on java libs rather than people writing high-quality language native ones. The sexp-based collection literals are very convenient, and coupled with the threading macros make writing and reading clojure code very productive and fun. Clojure has a lot going for it. The biggest issue I have with it is the same issue I have with any 'hosted' language. If it doesn't own the runtime, it risks being broken or held-back by changes it has no control over. Clojure is conceptually and syntactically simple, so it probably fares better than other JVM-hosted languages, and the JVM itself has historically been very stable at the bytecode level, but it still a risky thing to require your platform to stay stable for your language ecosystem to survive. I love you Clojure, but I'd rather invest in a language that controls its own destiny.