I don't really think this generalization holds. TeX is one of the very few widely used pieces of software that's considered complete, more or less everything else is either getting updated or superseded by other things.
Clojure, Elixir, and Lisp (especially Clojure) all have slower acceptable churn rates than other language ecosystems. If it works sensibly (both in terms of being fully debugged and ergonomics) and the underlying system hasn't had significant changes, what good does a commit within the past six months do beyond signaling to the GitHub meta game?
