* Deadlocks, memory leaks, infinite loops, etc. are all the sort of risks that Rust doesn't try to protect from. In my opinion it's okay to talk about "fearless concurrency" despite deadlocks in the same way it's okay to call Rust memory-safe despite memory leaks.

* Rust's type system also allows you to make safe interfaces like Rayon that do genuinely allow for "fearless" concurrency in a way that I don't really see in other general-purpose languages.