There is an insight around messaging which I think this is getting at, or at least which I've been particularly excited about: 1. It is useful to be able to na

There is an insight around messaging which I think this is getting at, or at least which I've been particularly excited about: 1. It is useful to be able to navigate conversations by topic (and sub-topics etc.). AKA making the search/navigation/sense-making activities easy. AND 2. It is useful to be able to just respond to what was seen last in a single stream. AKA making the responding/reacting activities easy. No one has gotten this quite right yet. Manual threading and nesting don't do this well, especially for graph structures. The ability in some applications to respond and reach to particular messages helps a little; but isn't coupled with a navigation view, and you can only respond to one 'message unit' at a time. (Though I also am not sure that the navigation interaction needs to be an entirely separate view as shown here.) I expect powerful language models to dramatically change this landscape, doing the magic for people of creating the navigation/conversation type of interactions (e.g. automatically inferring/suggesting "what is being responded to" for each message, thus developing a conversational graph (which can then be summarized and shown in a variety of ways). I'm curious who is innovating on this? (All I know of is https://quill.chat https://quill.chat).