How are UIs on third-party apps affected? If you turn on gestures, does it mean that on a third-party app, one has to use gesture now to do what could be done before using a back button?
If you turn on the gesture mode, it's still largely the same UI, it's just that the "App switcher" button is gone. The Back button is still there, in the same place as before (although it does disappear on the Home screen now, which is neat).
Tapping Home and tapping Back still do exactly the same thing. Long-pressing Home still opens Google Assistant.
Opening the app switcher UI is now done by dragging Home up (instead of tapping App Switcher).
Quickly switching to the last used app is now done by dragging the Home button right (instead of double-tapping App Switcher).
