So the question is valid: what benefit does one get using Rush over Swift on developing for Mac? Rust may be a better language overall, while still be an inferior choice in this context of Mac OS X Native app development.
I listed some of the benefits earlier in the thread. What I obviously can't do is prove it's better for native app development, because that depends on the developer.
Exactly. If those are goals you share use Swift. If not, it may not be a good match.