Just because you know things doesn’t mean you know what to do with it. Everyone and their dog knew about world buffs, man even noobies did when they randomly got it. But there wasn’t really a ‘world buff’ meta until tbc when guilds were pushing for server firsts and finally put 2 and 2 together. That’s when it got changed, if they would have used these earlier I almost guarantee they would have nerfed them on the spot.