On the one hand you say it's dystopian, but you also seem to be celebrating it? ;P Maybe a show with a fanbase of 1 is in fact the best show in the entire world ;P. Regardless: I don't think you end up with no shared culture at all, because if something happens to me that normally would only happen to just me I still tell my friends about it, and maybe they want to experience the same unique thing I saw, and the same will be (and already is, fwiw) true of AI generated slop.