I killed Anub’rekhan, Faerlina, Maexxna, Patchwerk, Grobbulus, and Noth back in actual Vanilla. We didn’t get any farther before BC came out and because we attempted to stonewall against safety dance and Razuvious (GG having like 3 capable Priests on the entire server) and never got any further.
But since then, I’ve cleared it maybe 40 or 50 times total on 3 separate private servers.
What made Naxx hard back then was a combination of the skill cap increase and time commitment which led to player burnout.
While my guild was extremely good and killed pre-nerf Twin Emps, we lost people weekly. During our trials in Molten Core, everyone showed up constantly, and we had a healthy 60 raiders with those 20 extras rotating in and out and running dungeons/pvp/farming while waiting for a spot to open.
During BWL we lost quite a few people because it took us 3 weeks of wiping on Vael. I think about 15 different people quit due to being burned out, or couldn’t commit to staying up 2 hours past raid time, or wanted to try a different guild.
As we progressed into AQ40 the noticeable spike in time required to prepare and farm for consumables, left us with about 35 people. We had to recruit, and on a server with 2500 people, that meant poaching from other guilds. I distinctly remember the amount of in-fighting we had when we decided we needed less Hunters and Warlocks for more Mages and Rogues, so we lost more people than we gained at first.
We had about 25 insanely good “cream of the crop” players, and through poaching, we found those other 15. We had 40 of the absolute best. And while we were geared, rich, and highly skilled, we were no longer revered. But Twin Emps folded, Cthun died, and we were the only Ally guild to step into Naxxramas for almost a month.
After we stonewalled on safety dance for a couple weeks, and the amount of trash we killed led to even our Paladins having Ghoul Skin Tunics and Misplaced Servo Arms, BC was on it’s way. With news of that, we lost more people. And we never recovered beyond that 6/15 mark. Looking back I don’t think we were that good. Not with how good I’ve seen people play on private servers.
Heading forward this time, I foresee it being a lot like how it was. People are going to go so hard early on in MC and BWL that they’ll have little desire for AQ40 in a progression state. Some will go casual or raid less, and the elite will be further ahead than before. I think you will however see more guilds doing it this time. But it will remain that a lot of burnout is going to happen. People are older now, have kids, and while Vanilla is insanely fun for me, it might not be fun for someone else when they realize they need to be farming an additional 20 hours a week to prepare for Naxx and be successful there.
Naxx will come and people will hit those same walls; logistical and time allotment. The skill cap will have nothing to do with it. Google, the sharing of information, and the ability to prepare better beforehand will assure that Naxx is done by more people, much quicker. But the majority of your average raiders will fall behind the progression cue ball, unable to hit the 8 ball, and wonder when TBC Reforged is coming out.
Me? I’ll be done with Naxx, enjoying the spoils on an alt, and wondering when the next F R E S H server launches. For as much as I love raiding Naxx, the entire journey is paramount to me.