Another video with GJS, Hickey (Clojure), Alexandrescu (D) and others discussing the merits of various programming languages and where we're headed is now available.
What language, besides your own, do you wish you had invented?
Andrei Alexandrescu
There's only one answer, really. Lisp. I mean I'm not even kidding. Lisp is the one language that has said the first and last word on so many fields, it's pretty much amazing. It has introduced garbage collection when it was almost impractical to do it. It has introduced functional programming, it has introduced a lot of notions that people have ever since rediscovered many times over. So, I wish I had invested lisp.