That makes no sense without specifying what Lisp actually is. S-expressions are a generic tree, that's not a language, that's just syntax. Is it CL, Clojure,

That makes no sense without specifying what Lisp actually is. S-expressions are a generic tree, that's not a language, that's just syntax. Is it CL, Clojure, scheme? Like these don't even share a basic object model, it's like getting the AST of Haskell and C and then talking about how good that AST is.