[Splognosticus]

Well, by definition "unordered" means you can't count on any particular order. So while parsers may indeed preserve order, anything that relies on it is in violation of the standard.

That said, I agree that being aware of this is important if you're emitting JSON. You'd think nobody would ever address a JSON object by its ordinal position, but programmers are lazy and worse, think they're clever. :)

[taeric]

Exactly that. I did not mean to disagree that it is somewhat wrong. Just feels dangerous, as behavior could change with no side channel warnings.