No, no. Rust's unsafe is fine. After all unsafe is not a problem because it is directly obvious just by looking at the source of your 200 dependencies. If you still have doubts you can make sure everything it is ok simply by writing "SAFETY" next to it to point out that it is safe (btw: not having this is a serious omission in the yes-rs project). And anyway, the compiler still does basically almost all checks! This rest is entirely obvious in Rust. For example, there can never be a subtle exception-related issue that make this difficult to analyze because in Rust it is called panic. And if there is still should be a mistake, then this does not count because it was not the fault of Rust but yours. (This is totally different to C where even the most-expert programmer can never know when he is going to free memory or doing pointer arithmetic. This could literally occur completely surprisingly in every line of code!)

Without it, we can't use the quantum enhanced string, which is safe because it's written in Rust.

I think you missed the joke