If you think the Doordash app is going away, just think about how much harder it is to answer “What do you want for dinner?” vs. being given specific choices
i think it’s very likely that first-party interfaces go away: Airbnb’s app for Airbnb, Doordash’s app for Doordash. i don’t think either user interfaces or company branding are going away, but the ownership of the rendering surface likely will