Your point over everything being a singular linked list is a very good one. Even as a lisp user I wish that things were specified in terms of a sequence protoco

Your point over everything being a singular linked list is a very good one. Even as a lisp user I wish that things were specified in terms of a sequence protocol rather than a list data structure. I believe Clojure rectifies this historical anomaly. In their defense the people creating Lisp didnt have any prior art and were making rules as they went along.