User blog comment:Twilight Despair 5/New Plots/@comment-3045936-20180607041214

I mean aside from Michael maybe the other plot of season 14 is keeping Heaven going. After all when Heaven has enough angels they can keep it going theoretically forever. But seeing as how spatially separate and massive Heaven is. Even if you were to take Castiel old statement in season 6 that his true form is a large as a building in a city, it still needed many angels to power it constantly and keep it from Spatial collapse.