That's a good point. A lot of what I built classes and objects for in other languages can really be expressed as simple maps, hashes, lists, and vectors, and more complex types built from them. Clojure's elevation of maps/hashes/vectors to first-class types puts it above Lisp, imho, and its functions to manipulate said data structures are better even than languages like Ruby and Python.

I can't imagine having to go back to Java collection classes again. Ugh.