> which is an extremely rare source of bugs Confidently asserted, but very debatable. > The vast majority of errors caused by shared mutable state are related

> which is an extremely rare source of bugs Confidently asserted, but very debatable. > The vast majority of errors caused by shared mutable state are related to concurrency. Concurrency, like async-await, you mean? > TypeScript's type system contains features that Rust's does not have Sure, and likewise Rust's type system contains features TypeScript's does not have—for example, just try expressing anything close to traits with TS's type-erased generics. Since the feature sets aren't the same, I suppose it's a matter of opinion which type system is preferable. But I know which one is more helpful for me for sure (especially considering the aforementioned soundness issues).