Dear Apple, moving to a new iPhone from an old one is a mess: fix that
medium.com
medium.com
You want to know what's a mess? Restoring an Android phone (this anecdata is from Jelly Bean on a Note 3). iOS downloads all of your apps from scratch? Android didn't have the first clue what I'd previously installed, so it didn't bother to download anything; I had to go back to my Google Play Store history. I forget the details, but it was nothing like "my old phone with shiny new hardware".
Well, gee, I can't move to a new iPhone while orbiting Saturn in my Model T while in Airplane mode - about as insane as his article.
What bugs me are all of the apps that don't use Keychain properly and completely forget any needed credentials across an upgrade (e.g., store loyalty apps). Because people don't upgrade frequently, I imagine it is low priority to them to improve that, but it seriously made me hesitant to buy a new phone. It's in Apple's interest to push developers to be smarter about that.