Woah woah, wait. Being “at least as hard as mythic is now” on the date of my post is a very far cry from “the hardest content the game has ever seen.” There has been content in the game that was harder than any raiding content.
Incidentally, I stand by my actual statement. You’re saying Ragnaros was downed by a guild whose members had apparently previously done thousands of pulls on the fight on private servers and in Vanilla. My post was posted on March 14, so “mythic … now” was BOD in a near end of patch maximally nerfed state, when people had gear 10 ilvl higher than when Jaina was first downed.
Give Method a few thousand pulls on BOD in that condition on the PTR, then release it without changes, and do you think it would take longer or shorter than 24 hours after getting appropriate level and gear for them to down Jaina? I think it would have been a heck of a lot shorter than 24 hours; in fact I think they would have one shot the whole instance.