But PBBGs don't have that problem. You as the developer are strongly in control of what the players see and when, and players really don't expect constant, live interactions with other players. The text-based slant of PBBGs would also work well for this. What I am envisioning would essentially be an open-world game where the player can do the normal PBBG things, but there is a large quest chain that runs all through the game that constitutes the "main story". Updates could further the main story arc as time goes on, and it could even be tailored to what is happening in the player community, such as major item finds, large boss kills, etc.
Since PBBGs are already typically a mix of multiplayer interaction and single-player play segregated from other players, I think this would play to the strengths of the genre.
