Yeah, I think the re-render(?) breaks flow as completely as traditional reader mode, it doesn't matter that the uncluttered version retains some of the look of the original. If the text doesn't stay in the same place, flow is broken. In addition it seems there's some animation affect in the original->uncluttered transition that makes it slightly more jarring, but is not fundamental.

Thanks for unclutter, careful listening to feedback in this Show HN post, and pointing out your inspirations at https://news.ycombinator.com/item?id=33718859! Though I've never connected with its functionality beyond reader mode (in any tool), I'd love to at some point, but it's hard to get right in a way that doesn't become burdensome or transitory. I want browsers to become much more powerful user agents. Stuff like hypothes.is that I see you've integrated with is super cool, just not there for me yet. Godspeed!