I am not sure why Clojure is "stagnating". I don't think it's about Emacs, we have Cursive now which is very powerful and runs on top of IntelliJ. Clojure also is picking up in webdev. A new book just came out from Sotnikov, Arachne was announced recently, Om is being worked on, couple of different screencast series are being made, etc. I am not a seasoned developer but I like Clojure and I am sticking with it because it makes sense to me. I think it's an awesome language and I wish more people would try it and develop in it.