Awesome. That give me the idea: lein2deps might support updating /syncing an existing deps.edn while preserving comments, etc using rewrite-edn which is also used in neil

I might have a use case for that in babashka where I'm still using lein for deployment + deps for development and testing (but I'm going to rewrite it to deps.edn at some point anyway)

I guess one could use lein2deps as a library, get the new deps map and use rewrite-edn to merge in those changes programmatically already today

Indeed!