>>1
Why isn't anyone it used outside the academia?
But they do! Take Reddit, for example: they initially wrote it in Lisp, got funding from Y-combinator and attracted a lot of CS freshmen and sophomores for their seed audience, then rewrote the whole thing in a real programming language.
Interesting to note that it took them one weekend to rewrite the code they spent half a year working on in Lisp. And yet, the language is so good at getting funding from Paul Graham and attracting geek users that even such a drastically reduced productivity is a fair trade-off.