When I learned LISP (does that even still exist?) in college, the % was key to finding the matching parentheses. I seem to recall using it often at work when my C nesting got a bit out of control, as well :)
Yes, it still exists in commercial use. Cadence, who makes programs for electronics design automation (EDA), uses it in the control and GUI layer on top of (some of) their C/C++/Fortran core programs.
That's on programs based on their long-term legacy database, at least. Newer EDA programs - from Cadence and others - tend to use tcl, which I hate.
Though I have not been involved with it, I understand that LISP is the preferred language for neural network researchers, and that they have come a long long way in the last years. I am surprised none of the super-IT guys here on the thread didn’t reply to you.
The ELISP variant of LISP is used to customize EMACS and Xemacs and I use it a fair amount.
Yes. But have you heard of "blub"?
Lost In Stupid Parentheses? Oh, yeah!