[treerex]

I love Common Lisp, and as you say, there are many outstanding libraries that Quicklisp gives you easy access to. ABCL hasn't been "marketed" enough to the Java community, so it has less mind share. When I last looked at ABCL the Java interop was not as clean as Clojure's, so while it was there it felt more clunky. This was at least a year ago, so things are probably better.

I use Clojure to implement a portion of a semantic search engine: it is packaged as a REST servlet that responds to requests from a medical POC application. Because of the Java interop I utilize our internal libraries and from the ops perspective they are just deploying a WAR file that plays nicely in their reporting infrastructure.

I've been using Clojure since its first release and am comfortable with it and its ecosystem. ABCL is a contender, but I have yet to do a performance comparison, both for native and interop tests. And in reality the only part of Common Lisp I really miss is the condition system. Clojure as an implementation of CL's format and I was never a big user of loop, so...