I'd reckon most of Clojure is from ten years ago. Excellent backward compatibility, you see :) cf. https://hopl4.sigplan.org/details/hopl-4-papers/9/A-History-...

It's a blessing and a curse that zero innovation has occurred in the Clojure space since 2016. Pretty sure the only big things has been clojure.spec becoming more mainstream and the introduction of deps.edn to supplant lein. altho I am still partial to lein.