Im a good few hours in, and I have to say that I like this a lot, and since a lot of post are about having patience, Im glad to have the experience of wainting 9+ years for a book.
The thing is, compared to other games, you dont even have to have that much patience with Eternum.
Other games have more frequent releases, but also shorter Updates. You have to wait 4-6 months per Update for Eternum (if I remember correctly), but you will also have a long playtime (if you are actually reading and not just skipping) and more scenes (0.6 gave
3 4 new H-scenes, which all were long).
Other games update more frequently, but have shorter Updates.
So I dont think that more patience is required overall, because you also get more out of it. And I personally like that I can sit down for quite some time when Eternum has an Update, compared to other games which update and are finished after 20 minutes.