Clojure is a small "industry" with a few key players offering a lot of the guidance and advice. Nothing wrong with that, but often the community does in fact adopt the guidelines of just a few people, so that is probably why the author continues to contribute in this way. This author, for example, also wrote one of the tiny but widely-used functions used for unit testing in Clojure, for example. Almost everyone uses it at some point (the "is" macro).
