I will not use WhatsApp any more than I can help it. And it already has Meta AI. I might try it once you support other clients. Are you going to develop all your own integrations or can users contribute? What are some things you envision users doing asynchronously? I haven't feel the need for an asynchronous assistant, probably because I do not find existing models reliable enough. The most async I go is with coding…
For me this cancel and restart thing e.g. in ChatGPT is so annoying. Plus most chat tools don't even get your second message if you send it before they finish, so you're locked into waiting. And in this coyote approach I can just add more context if I forgot something and it picks it up without cancelling what's already running. It' s more like talking to human.