Great article. Really advances the thinking on error handling. Rust already has a head start compared to most other languages with Result, expect and anyhow (well, color_eyre and tracing), but there was indeed a missing piece tying together error handling "actionability" with "better than stack trace" context for the programmer.

With regards to context for the programmer, I still think ultimately tracing and color_eyre (see https://docs.rs/color-eyre/latest/color_eyre/) form a good-enough pair for service style applications, with tracing providing the missing additional context. But its nice to see a simpler approach to actionability.