I have an Apple TV and multiple HomePods, both the mini and the original. While all of them will work for scenes the Apple TV works best for automations so I have smart plugs for all my HomePods that power then off and back on on the middle of the night to make sure the Apple TV is the main hub.
You seemed to have left out when Fortnite was removed from the play Store and lots of fake scam apps popped up in their place. So yes things would most likely change.
Plus there are a handful of app developers would would love to leave the App Store. Basecamp and proton come to mind. So now you have at least 3 app stores to add.