I just upgraded from a 6S to a 7 via iTunes. I was also surprised to see how apps had to be downloaded again from the App Store. That doesn't bother me, but I c

I just upgraded from a 6S to a 7 via iTunes. I was also surprised to see how apps had to be downloaded again from the App Store. That doesn't bother me, but I can see how it would be a problem for someone with limited connectivity. 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.