"70%+ yearly turnover" Much higher than the food store I worked at as a student, long ago. If success is impossible because of high turnover, surely the language will not matter. Ironically, it is possible if there are management problems causing extreme turnover, then Clojure would be a strong advantage for management as a scapegoat.

I was on a major automation project where mgmt nailing down the specifications across four existing departments procedures took over a year... hard to imagine devs working less than a year making sense of it.