One of the reasons they're still around in Common Lisp is to serve as a baseline for the set of cadr functions it provides. Never use them myself, but I suspec

One of the reasons they're still around in Common Lisp is to serve as a baseline for the set of cadr functions it provides. Never use them myself, but I suspect once they're part of muscle memory they make dealing with lists very convenient. clhs.lisp.se/Body/f_car_c.htm