While 40-player raids sound epic in scale, the effort coordinating 40 players to be at the same place at the same time -- much less getting them to act as a cohesive unit -- was a fairly major undertaking. And though the new Molten Core takes away some of the headaches by making the event LFR, getting even 25 people to work together in LFR is a challenge.
Will I be in the new anniversary version of Molten Core with everyone else? Sure. (After all, I want a Core Hound mount as much as anyone.) But have I missed running Molten Core all these years? Not really. What about you, fellow raiders? Are you feeling nostalgic for the good old days of vanilla?