Yes I know Java and the challenges with exceptions there (checked vs unchecked exceptions, errors). But at least (arguably) in Java, the methods (for checked exceptions at least) declares what class the exception / exceptions is. I personally do not think wrapping exceptions in other exception types, in Java, is a major problem. In Swift, you just have "throws" without _any_ type. And so the caller has to be prepared for everything: a later version of the library might suddenly return a new type of exception.

One could argue Rust is slightly better than Java, because in Rust there are no unchecked exceptions. However, in Rust there is panic, which is in a way like unchecked exceptions, which you can also catch (with panic unwinding). But at least in Rust, regular exceptions are fast.