Reddit.com, a group link site, has switched over from running on Lisp to running on Python.
If Lisp is so great, why did we stop using it? One of the biggest issues was the lack of widely used and tested libraries. Sure, there is a CL library for basically any task, but there is rarely more than one, and often the libraries are not widely used or well documented. Since we’re building a site largely by standing on the shoulders of others, this made things a little tougher. There just aren’t as many shoulders on which to stand.
Powerful language is no substitute for powerful libraries. New language designers should target their languages to run on the JVM or CLR if they want their language to gain traction.