Can’t be arsed to the the entire thread to check if the points have been made already, but for me, it’s largely about being too fresh in the memory. It can work well with non-fiction books (or films for that matter), and even dramatised/ semi fictional works), but I guess there is less hunger for fiction works.
From my own perspective I would add that because most relevant events of our recent times are so fucking depressing, there is less appetite for them- again, purely from the fiction end of the spectrum.