It has a very small portion of the mindshare. Almost everyone uses R, Python, or one of the proprietary things.<p>I use Clojure for any data science type tasks I have, but that is because I am primarily a Clojure developer.<p>It is very nice for a lot of basic data analytics -- but I doubt many full time data scientists use Clojure as their primary tool. The number of libraries available for R and Python is pretty amazing.