I'm a little late to this one, but I just finished the series for the first time, and was a little confused about one aspect of the ending. I get that there was a parallel/afterlife where dead characters would live lives as if the plane never crashed. My main question is around the "timing" in which they arrived there.
I assume that characters who died during the show arrived to that place almost immediately. However, what about Hugo, Ben, Kate, Sawyer, and Desmond? What I think is they went on to live full lives and when they died, they arrived too. But since there was no real concept of time in that place, they were all together when Jack (the last) got there.
Also, what about the characters who were in the afterlife, but not on the island (like Jack's son). Where those spirits as well, or just part of the world the characters created?