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 viol

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. :)