For example Primal web is the peak of "chunks". AFAIK, it always shows you just one further level of responses, but if you want to see response to a response, you have to click again to go " further ". Slack - it might be just a nature that it allows just a 1-level-deep responses, and everything is then just a chronologically sorted responses to the top level note. - On the top level note, you see "123 responses in the thread", clicking on the note loads a note specific page with the full thread of responses below. - whenever you get tired of scrolling and reading, you just click to go back (or use keyboard shortcut), and you land back to your channel feed. I always liked the setting when anyone is allowed to create any amount of public (ie searchable) or private channels. And then even within the channels, no matter how many participants they have, it's easy to browse the top level notes, and zoom into only the ones you care about. Someone still might be spammy and keep responding to everything. But it's little easier to just scan and skip than in the pure chat UIs.