And I don't mean a thing that further zombifies it.
Currently, despite Reddit's state and really unpopular leadership, its traffic doesn't show the signs of decline. In fact, it seems to be the opposite.
So what would be the least drastic things that could finally put Reddit on a course that would make its userbase bleed out, putting its traffic on a decline? Or things that would somehow make Reddit meet its sudden end? Could be a combination of several things as well.