I always like Seurat's paintings. Depending on where you stand you see either dots or people in a park. It's a point of discovery because there are no easy categories. It's true for Seurat, and it's true for this particular moment of the zeitgeist that takes place in the '20s, and it's true for comics becoming literature as they lose their central function as things that sell newspapers, let's say. So breakdown of genre is the moment of possible discovery.
Genre is just the superficial manifestation.
People get used to looking at genre for guarantees. When those sorts of distinctions weaken, it can be unnerving. And that's the terrifying moment that can lead to revelation. Nonfiction associates itself with the exterior world and fiction presumably deals with sensibility. There's a point where those things do and must meet.