Curious but can we use lean4 as port target instead of Rust?
Just cause it isn't used for webshit doesn't mean "approximately no one" has heard of it.
Lean is pretty much the most popular language mathematicians use today for computer-assisted proofs. More mature audiences may know about Rocq, Isabelle, etc., but Lean was already popular enough for a few people I know to have written their PhD theses on it about a decade ago.
I think GP is joking about a port to Lean because that would at least produce a formally verifiable output.
I like Lean (and more generally dependent types) but ffs Lean has a very, very small userbase for a project like this. GGP would have to really justifyv the benefits for such a switch.
My first programming interview my interviewer was like what the heck are you doing with D? And he noted he has a room full of devs where nobody knows what D is.