I can't agree more. Not only is documentation incomplete (in some cases), things are even worse. For example, spec is still slower than plumatic schema (which predates it) and tools.deps/tools.build still needs to catch up to leiningen options.

Most Clojure projects are maintained by a single person - Alex Miller. Even tickets to jira are manually entered by him after you explicitly write a bug request in ask.clojure.org. Quite a closed community; no wonder many significant contributors left for other venues.