This is not what I meant by maintainable. The companies I've programmed clojure in were sizable and bet on it for their entire stack, and hired very sharp senior people to work on them.

Even there, the projects suffered so much to hit release dates and stay understandable as the system grew that velocity suffered relative to peers doing experiments in traditional OO languages. In fact, the maintenance burden (for code composed by smart senior people!) is so high that it's actually convinced me on the virtue of regular OO/procedural languages over lisp.