Comment by rahulmutt

Thanks for bringing this up! I will definitely add a section for explaining the benefits for Scala and Clojure devs. I shipped a non-trivial Clojure web service to production that was handling 1M/requests a day. The experience is what made me finally understand that the JVM is wonderful platform, and what prompted me to work on Eta, given that Frege was insufficient for what I wanted (not supporting a lot of useful GHC extensions). Clojure was wonderful in the fact that I could become as concise as I wanted via EDSLs, and the immutability by default + concurrency primitive were a joy. The lack a type system (please don't mention core.typed) and compile-time errors at runtime were really a pain. I'm sure you can ameliorate that with libraries like prismatic/schema (which I did) and strong test discipline, but it's great when the compiler just takes care of all of that for you. Once you really "get" Haskell-like languages, you miss the benefits no matter what language you try. As for Scala, I haven't built anything significant and I wouldn't want to for some of the examples I've seen. It's too verbose for a typed functional language.