Yeah, I get that this is what they're aiming for but home server with Plex is justified by the massive size a video and even music collections can reach.
Plex can also transcode, which is more important if your video is on a bunch of different formats that might not have hardware support on all your devices.
I think a lot more people share their music and video collections than their book collections despite the file size differences. Maybe it's because there isn't a book-Plex?
Maybe it's because music and video can be easily consumed during the duration of a visit, whereas books take much longer? "Check out what I have on the server" makes sense for music and much less sense for books.
