Can we talk about YAML?

I'm relatively new to the Rust ecosystem (< 1 year), and I was pretty (perhaps naively) shocked at the gap in a community official YAML package. While I'm not a fanboy of YAML, it does have its grasps on key parts of infrastucture and configuration that TOML does not fill.

Vaguely understanding the serde-yaml (deprecated) concerns of the serde developer (?) did we all just decide on TOML/JSON everywhere? What is the current state of YAML, and what is the goto defacto now?

I used to poopoo on Node for having a package for everything and I'm running into the inverse problem in Rust. Appreciate any feedback from the local seniors and explorers on this issue as I'm getting deeper into the rust ecosystem.