You have the sort of OT fans which are like level 5 Simpsons fans who only consume seasons 1–9 and everything else is inferior (joking). Then you have people like to go on into further in seasons like 15 etc (Prequels) and then you have everything after that which some people obviously still enjoy the show or are coming back after so many years because it was getting some praise again.

I know you might be able to apply this to other fan bases, but this one just seemed closer.

I personally dip in and out, there have been some decent ones lately.