Like it or not D&D is THE flagship of the hobby.With no D&D the hobby would have a lot less bodies coming into it.Now dont get me wrong,I play Pathfinder and think that even more peeps would gravitate to it,since it might be the only'big' game left in town.I just honestly think that w/out D&D it would be the gradual decline into oblivion of our little social exparement.