Common LISP was made to smooth over the differences of the ancient LISP&#x27;s plus standardize their situation a bit. If those don&#x27;t matter to you, then the alternatives are often better. SBCL being one of them. If I get back into LISP, I think the Racket Scheme community looks like it&#x27;s delivering most bang for buck in terms of what the tools can do after investing time learning them.