- Music.
- Camera.
- GPS Navigation.
- ForeFlight.
- iMessaging.
- Phone calls.
- Health monitoring (e.g., trails tracking, step count).
Everything else is ancillary.
Easy.
- Buy an iPod Classic. Sync music from computer.
- Burn CDs for the car of playlists.
Buy a Sony mirrorless camera. ~$500 USD. Start carrying that when you want to take pictures!
- Buy a dedicated, Garmin GPS.
Cons:
- You lose police reports from Waze and traffic from Google Maps.
Just have to use the iPad for ForeFlight.
- Buy a dumb phone. Just have to tell folks I'm not iMessaging anymore. Text me or add me on an IM thing.
- Buy a Garmin watch.
- Do nothing! This isn't super required.