I suppose my point was that the principles of Lisp have lasted 50 years. Python (which is great) is the child of many, many Lisp-y ideas, but I don't think people will be using a variant of Python 32 years from now. But I would definitely bet there'll be many cool Lisp variants 50+ years from now, some of which may have taken some really good ideas from Clojure. Let's make it happen ;)