You might want to turn these features off, but you surely want to retain everything in them.
For those who don’t want to sync their email, just retrieve it, the location of messages isn’t always clear.
There’s a switch for that, but a second switch that needs more examination.
The Migration Assistant app can be used to transfer an account from one Mac to another.
If an ISP sets up their network insecurely, you could see other networks.
Sometimes pictures get rotated out of whack. You can fix it in Photos.