I'd see this being more useful to a non technical person who doesn't use Github for example and just wants to start a quick conversation. They can create a disc

I'd see this being more useful to a non technical person who doesn't use Github for example and just wants to start a quick conversation. They can create a discussion and open it up to the world. Given a bit more time there will be more features to keep track of mentions and notifications that lift it up from it's currently very basic state.