It seems a little crazy that we have a TOML stdlib but not YAML. also TOML is ugly
If you think you need to serialize something more complex, use XML. It might look ugly, but it’s very powerful, can be verified on many levels and has a mature ecosystem.
“Cooler” doesn’t always mean better, especially for bigger data. Neither YAML, nor JSON scales to that sizes while being readable and easy to maintain.
Also, I think TOML stdlib gets to the heart of what I've been arguing. People who like syntactic whitespace like YAML. Everyone else (like C devs) don't. It makes quite a bit of sense to me that C devs don't want to touch YAML with a 10-ft pole.