There's one UX wrinkle I haven't sorted out yet, which is that I would ideally like to let readers propose new branches to support rebuttals/perspectives I didn't consider in the initial draft. Probably the cleanest way (particularly in my case, because the source is open) is to request PRs on the Ink script with new branches. But non-technical readers are unlikely to be comfortable working with PRs, even in a language as approachable as Ink.
Well, and a second, which is that in my ideal UX for something like this, I'd like support for explorable models (like in Jupyter). You could probably merge Ink and Jupyter because Ink's Javascript integration is open (I added support for "choices" that behaved as hyperlinks in my portfolio site linked above).
To that end, these days I'm exploring hacking the Godot editor into a browser of "model-driven documents", but life is busy so progress is slow.