They may be depressing and frustrating, but I think they are necessary. They answer a "what-if" that most people learning Lisp will ask themselves at some point

They may be depressing and frustrating, but I think they are necessary. They answer a "what-if" that most people learning Lisp will ask themselves at some point. Eg: I was never into the Lisp usage of parents until I saw some of the alternatives (I still prefer M-expressions though, but that's just personal taste).