I appreciate even more ideas to work with. A more "working" proof language sounds interesting. While I agree that Rocq is decidably not for a "working programmer," I've had a lot of fun working through the book "Software Foundations". Last night, I was able to formally prove the pumping lemma for regular languages, and that was very satisfying and enjoyable. Another reason I'm learning Rocq is due to my (largely uninformed) interest in homotopy type theory.