All the gear all the time :) I was in a minor accident some years ago, and it was very nice to walk away with only a few bruises. Only addition I would recommend is pants and shoes, though some safety gear can look like normal clothes.

While I agree that would solve much of the motivation behind rewriting in rust, I don’t think it would bring many of the rust-enthusiasts over to C. For me at least, the killer feature of rust is having a modern tooling and language with proper library management, functional stuff in the language and one language standard everyone agrees upon.