I think the most interesting thing about the article isn't the solution. It's the problem: how do you organize a long piece of writing (O(100k) words) into logical units whose length isn't dictated in advance, and which don't force some kind of manual global refactor (e.g. renumbering chapters) every time a change is made.

The author's solution (one big file created with Vim) is reasonable and seems to work well for him. However, it seems to trade modularity/reusability. I'd be interested to hear about a microcontent solution (and the attendant tooling) that doesn't make this tradeoff. Or if I'm wrong about the tradeoff, I'd like to hear why.