> LISP/Scheme, where block comments were never a thing (I think.) Lisp does have block comments, #| This is a block comment |# You can also use feature e

> LISP/Scheme, where block comments were never a thing (I think.) Lisp does have block comments, #| This is a block comment |# You can also use feature expressions to effectively comment out code #+(or) (defun foo ...) The reader will skip over the following sexp if the feature expression isn't true (and `(or)` never is).