being written in rust might make it more appealing to develop, but it doesn't give any benefit to the user and I can't see it being a reason for someone to use this over vim
Rust programs tend to be more stable, more efficient, and more highly parallelized than equivalents written in other languages by developers of the same quality.
Again, I am not sure when is the last time vim crashed on my *nix set up. Not trying to sound unreasonable but in this argument of VIM/amp it might not be relevant.