This isn't accurate. OP's article says they depend on yaml-rust (https://github.com/chyh1990/yaml-rust), which is now unmaintained. Simultaneously, serge-yaml was marked as unmaintained to prevent people from migrating there en masse.
Sorry, indeed it's been about the other library. However, these issues are connected: dtolnay is a co-owner of yaml-rust too, so either way without him YAML in Rust has a https://xkcd.com/2347 problem.
You seem to be misunderstanding the comic you link.
With him that was the situation.
On crates.io, serde_yaml has 56m lifetime downloads and 8.5m recent downloads, and from his own announcement David hasn't used yaml in any of his project in a while, yet has kept plugging at it until now.
And yaml-rust has 53.5m lifetime downloads and 5m recent downloads, and has been unmaintained for 4 years.
