What a wonderful list of old features:

- iOS 11: Control Center customization

- iOS13:

- Dark Mode

- Shortcuts App

- Shortcuts Automations

- iOS 14:

- Compact UIs

- Picture-in-Picture

- Back Tap

- Automatic brightness (may be older)

- iOS 15

- App Library (maybe iOS 14)

- iOS 16: (Static) Home Screen Widgets

- iOS 17: Interactive Home Screen Widgets