I think that XML is often used for stuff that it shouldn't be used for. It could be almost OK (there are still a few problems though) for stuff containing text

I think that XML is often used for stuff that it shouldn't be used for. It could be almost OK (there are still a few problems though) for stuff containing text with other stuff inside that may in turn contain text, and so on. For other stuff, JSON or RDF or TSV or other formats can be good.