Also, since Rust provides and enforces the mechanisms to bypass huge swaths of bugs, like many locking errors, concurrency, exhaustive enum checking, etc., that

Also, since Rust provides and enforces the mechanisms to bypass huge swaths of bugs, like many locking errors, concurrency, exhaustive enum checking, etc., that frees up developers to spend their time debugging or reinforcing other areas where Rust can't make similar guarantees of correctness. I recall reading somewhere that a lot of the ideas for Rust's safety system came from a Firefox analysis of bugs that had been reported and fixed, where something like 70% of bugs fell into a few broad categories (mostly memory safety, like use-after-free, buffer overruns, off-by-one, etc) which they could solve in a new language that could enforce correctness. The idea of being able to remove 70% of bugs, and to effectively guarantee that any bugs that do occur happen in those remaining 30% of areas, sounds like it could save a lot of developer time.