Yes, the author can determine the granularity. It's a design decision.

I tried to publish some post-copyright books as long-form articles with footnotes and index, but habla had a meltdown because the doc was so large. I spent hours editing it as markdown, and testing all the links carefully, very frustrating.

I still have them, but I want to use my friends' wiki format to publish them, so that I can break the bits down and publish them as separate chapter-notes, joined by an index. Or something like that.

I do a kind of book-club on here, with old texts, and I'd like to host the texts on relays. That was the motivation.