When I used Common Lisp, I never heard of anyone using ->>. For me, it makes code massively cleaner.

Also, Clojure supports maps better than Common Lisp supported hashtables.

(But of course, any lisper can just define ->> & as->. It might work well with the rest of the language, I'd need to look at a cheatsheet with param positions & return values to judge.)

BTW, if anyone wants to teach functional programming... https://purelyfunctional.tv/teaching/