Back in vanilla I was in sub average guild, no where near server 1st. In the 8-10 months Naxx was open before TBC we had Naxx cleared to Patchwork. Today Naxx is going to get destroyed until 4 horseman and the last few encounters will be cleared within a few months. Half of Naxx was very doable by almost everybody. 12 years later Naxx is going to be easy cake with the exception of the last 3 bosses (horseman, Saph, KT).