Certainly where it makes sense to invest the time writing pure clojure libraries (or mostly clojure with optimized java in a few key areas if you're running int

Certainly where it makes sense to invest the time writing pure clojure libraries (or mostly clojure with optimized java in a few key areas if you're running into spots you can't get as good a performance in pure clojure but java will) is preferred, but at least this gives you the option of using the non-fp styled libraries until such a time as someone writes them. Improved bootstrapping at it's finest.