In order to escape from a failed Dreamworld, we first have to accept that it was never real in the first place. This is hard, especially if we don't have a backup, and I think that our world was purposely designed so there would be no way to have a backup Dreamworld. There are a lot of small, weak Dreamworlds, and they may be dismissed, but if I'm unable to live in our Dreamworld because it's no longer real enough to protect me from the Infinite, it's only a matter of time before people elect to live in these one's instead. Even a fool will leave when he's become unhappy.