Clojure is great, beautiful and simple, but it requires either good discipline and lots of tests, or good discipline and something like Clojure.typed, Schematic

Clojure is great, beautiful and simple, but it requires either good discipline and lots of tests, or good discipline and something like Clojure.typed, Schematic, or Clojure.spec. Otherwise there's just too many silly type errors at runtime. The good thing is that "runtime" doesn't have to be production - you can experiment with live data in a REPL and flush out most of the bugs, which of course doesn't diminish the need for good tests. I wouldn't recommend it for teams consisting only of junior developers and/or large codebases, where it can be hard to maintain good hygiene in the long run.