As ironic as it sounds, Classic server will be the best MMO for everyone that doesn't have a lot of time. Classic has an end, it is finite. No new content will be added, that means people will reach a point where they are done. Sure it will take ages to reach that point but each and everyone can get to that point without fear of a reset or that they are missing something. In my opinion this is super exciting that it will be the first Major MMO experience that let's you embrace what you accomplish. People with more time will simply re-roll more often or make an alt army, but someone that only plays a couple hours each day and maybe a week or two of hardcore vacation gaming can reach the definite end of Classic content if he sticks to it. The longevity of Classic WoW will be the best of any MMO out there. I absolutely love the idea of a MMO that is finished because it let's me enjoy what I reach more. Classic has huge content anyway so you don't really have to worry about running out of things to do (if you wanna 100% the game).