I like that explanation. It aligns well with my belief that language syntax/features/etc really don't matter that much in the grand scheme of things.

It's unfortunate because I know people that have not chosen Lisp as the scripting language because they want their product to explode in popularity, and they fear Lisp would actually hinder that.

All that said, with Clojure I think it's obvious Lisp hasn't really failed at all. Maybe it's better as a language just outside of the mainstream.