Go look for recent Clojure projects on github It's roughly half leiningen (counted 5) half deps (counted 5) with the occasional outliers using "npx shadow-cljs" or other unknown build methods (counted 2).
We specifically preferred Leiningen for all new projects at my last job because of a number of plugins we still used that were unsupported by Deps. This was a year ago, so that may have changed since I left.
I still find Lein a little easier to use, and use it for personal projects, but appreciate Deps's more data-driven, "simpler" approach -- and it seems faster.