True. Maybe that library that the Young Ones were in Scala was preserved via LoD? There is still a lot that can be done with that world.Well, the design of the world looks a lot like Scala ad Caelum, only much smaller. And we know Eraqus is a Blueblood. Maybe there's knowledge in the Land of Departure that needs to be safely guarded. Maybe to prevent the world from falling to whatever kind of fate Scala ad Caelum fell to, because we only get to that world via Xehanort.