I'm not aware of any better place for people to chat about programming languages including esoteric stuff like APL where someone actively developing the main commercial offering and another writing an open source alternative are actively contributing to the conversation and explaining how low level operations work.
I've seen plenty of experts here on stuff like Prolog, Lisp, Forth, Smalltalk (Alan Kay has posted on here), tons on Java, Python, R, C++, Julia...it goes on and on.
I've seen plenty of experts here on stuff like Prolog, Lisp, Forth, Smalltalk (Alan Kay has posted on here), tons on Java, Python, R, C++, Julia...it goes on and on.