The fact that the anyhow/thiserror crates are basically required, or you have to make a bespoke enum for your crate's errors and write conversion functions for them, is not great.
The try operator and Result type is amazing though.
Many languages have this discussion about what functionality belongs in the standard library and what is best left to external libraries - to avoid being stuck with a bad design forever because of backwards compatibility, etc.
I don't see a problem with relying on a few super popular basic libraries for almost every project.
Errors are still values in Rust - usually as part of the `Result` type - but unlike Go, it actually has tools to let you deal with them in a convenient way, like the `?` propagation operator (https://doc.rust-lang.org/book/ch09-02-recoverable-errors-wi...), or the functions on the `Result` type like `map`, `and_then`, `map_err`, or crates like `thiserror` for defining error types, and `anyhow` for easily converting them when you don't care about the details.