You are correct. The primary action is key. Yesterday, a Show HN [1] was an RSS reader that displays related HN/Redddit comments. I can imagine bookmark manage

You are correct. The primary action is key. Yesterday, a Show HN [1] was an RSS reader that displays related HN/Redddit comments. I can imagine bookmark managers alerting you in a similar fashion. It will not be as integrated as you specified (single thread by link...), but the scale will be much bigger : Theoretically you can link it (crawl/api) to any site, then you get a dashboard+notification on your existing bookmarks for new - discussion threads (HN/Reddit...) - annotations/notes (Hypothesis.is...) - reviews (alternativeto.net...) My coda/raindrop "project" is just a "doc template" we use sometimes to organize bookmarks in a small team. It is not supposed to scale beyond that. Many Coda features [2] come handy. [1] https://news.ycombinator.com/item?id=34188734 https://news.ycombinator.com/item?id=34188734 [2] like voting, grouping columns, collapsing outlines, hover cards, and word/tag clouds