A book is forever, a podcast or tv show is not.
An autobiography would be for the fans who would gladly invest some time into reading it, instead of having a podcast on in the background or watching a tv show after work. Some things are worth your time.
I would be devastated if they split tomorrow. Well, maybe devastated is a strong word, but I would be very sad at least. I still enjoy the shows, as do many, many people.