JSON is an interchange format, but YAML is pretty obviously meant for configuration, given the huge emphasis on human readability and editing. As for TOML, it'

JSON is an interchange format, but YAML is pretty obviously meant for configuration, given the huge emphasis on human readability and editing. As for TOML, it's a good replacement for mostly-flat INI-style files but the syntax is really awkward for the kinds of places you'd normally use YAML, especially nesting lists/maps.