As a former vanilla player (fond memories of 1.14 jumping physics bug), and current busy adult, I'm pretty excited about the idea of an MMO with a level cap. I can't keep up with new expansions every six months, but I can and will find fun things I'm interested in trying in an MMO with locked down talent builds and static endgame.
It won't matter if life gets busy and I can only log in once this week. At least I'm not aiming at a moving target anymore.
Casual gaming.