They simply force threads with a short topic and provide a subchannel-like view for them. Threads in Slack are hard to enforce (please don't write 20 "get well

They simply force threads with a short topic and provide a subchannel-like view for them. Threads in Slack are hard to enforce (please don't write 20 "get well soon" replies in the main channel). They are hard to parse (you have to scroll past all the threads, including the "get well soon" chain). And impossible to mute without leaving a whole channel behind. I can imagine this approach to help (but we use slack at work...)