[baq]

yaml is not a configuration language!

yaml is a tree serialization format with some human-targeted ergonomic features like comments and multiline strings built in.

it'll work for simple configuration files just as well as format-less .ini files will. for complex configurations, even xml is better, and that's saying a lot.

in practice for object graphs of any sort of complexity, like cloudformation or k8s configs, you want a programming language which can reduce the kolmogorov complexity of your configuration, because that dominates ops in the limit. or, IOW, configuration is code is configuration is code is ...