Easy to say that… I dont feel like digging through the archives…
But the same thing that guy is saying, we said it back in the day. Guilds walked in there, cleared the whole raid 25 man in 1 week and then we spent months and months with nothing to do. Because there was nothing else to do.
How do you think the community took that?
Shame. Cause blizz did a 180 with Ulduar. Only 1 or 2 bosses from the beginning were puggable.
In 25HC? Doubt it.
In 10 man NORMAL. And only AFTER they put a 30% buff to players. If you buff players by 30% its the equivalent of turning Mythic to Heroic. 
My point is the following: If all there is to the game is LFR… then everyone will clear the “hardest content in the game”.
But you talk so much BS…
I mean… do you think for any stretch of the imagination that ICC25 HC or Ulduar 25 was puggable or casual? What universe do you live in? I wiped 700 times to the LK 25 HM you know?
LK was one of THE hardest bosses in the history of this game. They had to nerf the raid by a flat 30% (on top of boss tuning) in order to even make it accessible to the general population, otherwise only the top guilds could access it.
Im sorry. But NO. I was there. I remember WotlK very, very, veeeery well. It broke me so much that I stopped raiding hard-core after that expansion.