I know that "Rust is about safety" is the message that gets out, but I don't think it really is. At least, not any more than "Haskell is about safety". Rust i

I know that "Rust is about safety" is the message that gets out, but I don't think it really is. At least, not any more than "Haskell is about safety". Rust is really about zero cost abstractions, IMHO. The borrow checker is a tool that allows you to work towards memory safety with zero cost abstractions. As a Rust developer, I'm actually much less worried about safety than I am about the zero cost. Rust allows me to achieve that zero cost without blowing up in complexity (which is sometimes hard to believe when you are wrestling with a borrow checker problem ;-) ). Having said that, I'm totally happy if there can be formal verification of these things. However, I certainly don't consider it to be job 1.