While I don't care about this time ordering stuff (never noticed anything is missing from my enjoyment, thank you very much), who says ebooks couldn't help with

While I don't care about this time ordering stuff (never noticed anything is missing from my enjoyment, thank you very much), who says ebooks couldn't help with that? It would be easy to include all sorts of fancy progress trackers. And not only progression of time. I sometimes have trouble following all the characters in complex novels. ebooks could provide handy help pages visualizing the entanglement of the actors as the story progresses. And who knows what more. I suppose current readers are not really equipped for it, but the next generation might be. I see no technical reason not to have that kind of stuff.