Assuming that the subtext here is wanting to address potential reasons for Lisp's chronic underpopularity, I think that all conversations like this miss the mark. Lisp was never failing to attract many users because people hadn't experienced sufficient evangelism about all its advanced features. It fails to attract many people because it's not a fun language to get started in.
A year or so back I picked up a copy of Land of Lisp and burned through it for pleasure reading. And I was struck by how gross Lisp looks in that beginner-oriented treatment. Just this huge slog of car and cdr and let/letrec/let* and the 37 flavors of equals and the function namespace. . . and, all the while, you're being told that persevering in mastering this confusing minefield of subtleties will somehow enable you to write bug-free software. I doubt it's actually fun for most people, and the grandiose claims should beggar belief for everyone. I suppose I should count myself fortunate that I got to learn Lisp in college, where there was little attempt to make it fun, and plenty of graded assignments to keep me motivated.
Racket and Clojure are right to clean up some of the language's evolutionary history. That's a start. But even then, the treatment in beginner's guides isn't all that enticing. I've also skimmed through Realm of Racket and Clojure for the Brave and True, and, while both of them work hard at being entertaining (and were fun to just sit and read), they don't really succeed at dispelling the sensation that what you're mostly doing is wrangling with the language itself.
Compare with some of the more popular Python guides. They tend to be much more dryly written, but the actual flow of the guide tends to get you pretty quickly to
from pypi import have_fun
have_fun()