You didnt play vanilla then and/or you don't play retail on an acceptable lvl, or you would know that you needed to be mentally handicapped to not do your rotation on vanilla compared to retail, which was the case with most of its population anyways, nowadays you have tools to know how trash a player is, you didnt have this back then, so anyone able to farm the proper gear/consumables and execute that 1 single mechanic was a god.