I find it surprising that so many people are arguing about the benefits and drawbacks of `?`, when in my experience the handling of Result and Option haven't been an issue in practice on the consuming side (`?`, `.unwrap()`, `.map()`, `.ok()`, if let, match, let chains, let else, etc. help a lot), but where all the pain comes from is having to declare the appropriate error type itself. Libraries like `anyhow` takes some of the pain away, but declaring an appropriate struct or particularly an enum in the right places, and the boilerplate for all the type conversions (From/Into impls) are where, during development, I have frustration. What I do then is either use Result<T, ()> or a single `struct Error(String);`, and go back once I have all the scaffolding in place and pry the implicit error tree back into the type system. Anonymous enums like typescript (`A | B | C`) could presumably help here.