My vote is yes. Most configuration doesn’t need anything more sophisticated than key-value pairs, perhaps with namespaces. INI can manage that and TOML is basically a better-specified INI.
I can't tell if I've spent too much time on HN or if I came to this conclusion on my own, but TOML is my language of choice for configuration now. It's flexible in the right ways and sectioning of config is so important.
