This is sort of true, but it doesn't scale well. You quickly end up having a very verbose `ns` declaration at the top of every file as you try to extend your Clojure

To cut down on the noise, you can coalesce all your extensions into one `ns` but it's not technically feasible with `core` and needs to be done with another library:

https://clojureverse.org/t/how-do-you-write-library-wrappers...