Different voices
An advantage I sought for this hypertext was that one document could speak in different voices, and be available to different audiences.
Of course, the notion of "one document" becomes much looser when what exists is a network of nodes where readers can find different paths.
There are several voices in the hypertext's current version: a patient, sincere expositor, a more technical philosophical expositor, a freer but opinionated narrator of autobiographical descriptions, real and fictional, an ironic objector, and the voices of several "spirits of place" that appear in dialogues with the narrator.
An important issue, so far unresolved, is whether there should be distinctive link structures for different voices and different kinds of readers. This seems a good idea, but it runs up against the problem of typed links.