XML is a bit verbose but otherwise easy to understand. JSON5 supports comments.
And neither requires me to explain weird formatting nuances to devops engineers.
YAML is a pain to read (lists of structures are very messy), can't be auto-formatted, and is full of weird "gotchas" (Norway, errant tabs, etc.) if you don't do things "the right way."
Requiring the use of whitespace in formatting is wrong. End of.
I instant exit on XML conf files. I have no idea how to parse the info, maybe I should. But there are too many tags and my eyes instantly glaze over when I see it!