For the role player, the adventure is what matters. Experiencing the story, characters, trials and struggles make the game fun and exciting. In an MMO, other players are necessary to facilitate this. I can personally attest to playing an older MMO for the story but being pushed out by the lack of players doing old content. Nothing turns a new role player off from an MMO like logging into the newbie areas and finding empty fields and silent chats. Boosting players to 50 removes them from the potential player pool of old content. This is completely out of the hands of a newly joining role player. They can't stop others from abandoning them to the newbie areas.
Food for thought.
