What does that tell us? That there is a lot of legacy perl & php code around that has to be maintained? I personally used to like lisp (scheme actually) and ruby but I would never use them (or another dynamically typed language) again. Never! I'll take another look at common lisp as a (scripting) language when optional static typing is available, standardized, and commonly used. And no, typed clojure and (unfortunately also) typed racket aren't viable alternatives.