I find it interesting how we know from Universe B1 (and more specifically the offscreen adventures of Fedorafreak) that a universe can have multiple sessions happen in it. What happens if multiple successful sessions happen in the same universe? Do multiple new universes get created as a result? Could it be that the true nature of the life cycle of universes propagated by SBURB isn't just a linear sequence like what we see in the comic, but actually more like a branching tree?