This is an .ini:

    [section]
    option=value it the way you want it.
    ; And these are comments. That's all.

I don't argue. I use TOML too, but it doesn't change that it's an ini++. You can treat an .ini file as a TOML file (well, maybe comments needs some changing, but eh), they're not different things.

I don't think, even though TOML has some official spec, all parsers are up to it, and may have disagreements between them. It's same for INI.

You can have "native types" in .ini as well. The difference is you'll be handling them explicitly yourself, and you should do that in defensive programming anway. A config file is a stream of input to your code, and if you don't guard it yourself, you agree what that entails.