Well, that's part of my point. However, in Lisp you get to macro the language into whatever you like, so you can make lisp into the desired graph language, laye

Well, that's part of my point. However, in Lisp you get to macro the language into whatever you like, so you can make lisp into the desired graph language, layered on CONSs, but not so much with other languages because only in Lisp do you get to create an entirely new language. (People think of Lisp wrongly as a programming language, whereas it's really a meta-programming language.)