Since we're on a meta-discussion, I'd point out that this raised some flags for me: “A large project in C would implement the Lisp run time?” Oh really? You me

Since we're on a meta-discussion, I'd point out that this raised some flags for me: “A large project in C would implement the Lisp run time?” Oh really? You mean each variable will have the type LispObject (or PyObject or whatever)? Never happens, unless the C code is written by a deeply disturbed Lisp weenie (gcc and especially BetaPlayer, I’m talking about you). The fact that some people write C code as if they were a Lisp back-end is their personal problem, nothing more, nothing less. No, that's obviously not what people who say that mean. Usually, they're talking about what I've most recently seen sold as an "IoC frameworks" like Java's Spring. Meta-comment: He is awfully confident at ridiculing a claim he doesn't understand. If it's intentional, it's straw man rhetoric. Either way, it raises a flag.