One can claim that C is best improved by replacing it with a new languages. See Rust, D, and others. Lisp, too. -> Clojure, Julia, Racket, ... The 'step 1' 'ta

One can claim that C is best improved by replacing it with a new languages. See Rust, D, and others. Lisp, too. -> Clojure, Julia, Racket, ... The 'step 1' 'take Common Lisp' is already hopeless, because there are few people interested in that for various reasons. I don't think it's 'trivial' to fix a fading large niche language like Common Lisp, which was designed at a different time, with had much more design power back then. It's actually far from trivial.