>Lisp killer features were GC, good data representation, first class functions. Lisp's killer feature is procedural macros that are extremely easy to write and

>Lisp killer features were GC, good data representation, first class functions. Lisp's killer feature is procedural macros that are extremely easy to write and debug. Lua doesn't have such a thing, that's why Fennel was created. Erlang also doesn't have such a thing, that's why LFE was created.