I still don't know how to feel over DR's revelation that most worlds have just come back to being recently and don't really have centuries of history of existing separately. With the new revelation that ML takes place 4 Generations after Ephimire's rebuilding of the keyblade society makes me wonder how far in the past UX really was. Everything feels less spread-out then I personally would have wanted.
The drift here is both frustrating and interesting to me. Yeah, a lot of the premise of KH has been strongly called into question and not even through a shocking twist but just through somewhat confusing and casual revelations. But in a way, isn't the worlds not having real history closer to the truth? You can watch Aladdin in a DVD player over and over, and it will be the same every time; centuries worth of Agrabah history will never come into existence. A world is a story that plays out, and like a DVD, it can be replayed
through memory (CoM), data (coded), prophetic illusion (X), or even its own dreams (DDD). But even if Sora's adventures in the world are slightly different, the base story he is modifying by interacting with it remains ultimately the same, and trends towards its same path.
You might call it the "world order".
The reason I kind of like this stuff is because I feel like it's implicit in KH from the beginning that this universe could never actually function as a bunch of planets in space sharing the same universe and rules. I feel inclined to list examples here but I'm sure everyone has already thought of numerous ones while playing the games. Yes, the illusion has been broken, but it was always an illusion, and now we are witnessing the falseness of reality itself.