Stable wars gave us better storylines IMO, because instead of having to write feuds for 2 wrestlers you could write for 6-10 guys at one, book multiple matches, and build rivalries. I understsnd that singles stars are more marketable, which is why Vince/WWE gives no fukks about tag team wrestling, but there's only so may guys on the roster who can give great performances on a weekly basis. Stables help hide some of the weaknesses in your roster. And if the stable is over/cool enough it moves merch too.