D&D PDFs to DriveThruRPG and RPGNow, a thought that has forever echoed in my mind returns to the fore: Games Endure, Game Sessions are Ephemeral.
Games endure in the books where their rules appear. Games endure in the understanding of the rules that echo in the heads of the GMs and Players, often passed on to other gamers through the years. To some extent, it is the same for game adventures / modules that are published.
But game sessions don't find similar immortality. While some of them may find some partial, twisted, modified, aggregated, ghostly existence in our memories, they fade with time. And as we pass on ourselves, they grow ever fainter.