I still don't understand why people use toml. It's like someone said, man, yaml is great but it could be better and toml is the result.

Only yaml isn't great and toml is so much worse.

Sorry sounds off topic but the way you say it's "easy to configure" and include toml in the same sentence just gave me flashbacks to traefik.

Complicated toml is unreadable, if yaml isn't enough, you probably need json, not toml.

Official, meaningful tooling for yaml also doesn't exist. Parsing and emitting yaml does nothing for anyone until you can actually extract structures from the format.

The full yaml standard is also full of features no one ever actually uses in practice, but if you don't implement it, you are thusly not compliant with the specification.

If you read it, you'd go, "Wow, you can do that?" and "That's bad that you can do that."