About this:
===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.===
If Clojure was available back then and if you had written it in Clojure instead of Lisp (and given that Clojure can leverage JVM based libraries) - would you still have continued using Clojure?
I know this is an extremely hypothetical question but I am trying to figure out if Lisp is finally getting ready for "mainstream" adoption because Clojure is bootstrapped of the libraries of Java.
Clojure is a beautiful language and its web ecosystem is improving rapidly, but breadth of, depth of, and support for libraries is still its main weakness next to the likes of rails and django. Clojure's a lot better for solving hard problems, but you'll also spend a lot more time getting tripped up by things that seem like they should be easy and reinventing wheels. Fortunately, it seems a near certainty that this will eventually no longer be true.
Edit: Found it. It was the 14th post on our blog a time, but definitely light on the implementation details. http://www.redditblog.com/2005/12/on-lisp.html