What are the potential drawbacks or limitations of using `thiserror`?

While `thiserror` simplifies error handling, it can introduce extra code to manage if not used carefully. It also doesn't provide any functionality for actually *handling* the errors, only for defining and propagating them, so you still need to write the `match` statements or implement error handling strategies yourself. The use of derive macros can also sometimes make it harder to reason about the generated code.