Everquest started doing this long ago (~2006 I believe?), where people could progress starting at the first expansion. They would slowly move a server through t

Everquest started doing this long ago (~2006 I believe?), where people could progress starting at the first expansion. They would slowly move a server through the expansions. EQ2 looks to have it now as well. It's pretty successful in context, if I remember right, though naturally much of the original Everquest magic wasn't quite there