Nobody is talking about the performance implications to the photos and messages app. All these image hashes and private set intersection operations are going to

Nobody is talking about the performance implications to the photos and messages app. All these image hashes and private set intersection operations are going to eat CPU and battery life. This is the downside to upgrading your iOS version. Once you update, it's not like you can go back, either. You're stuck with a slower, more power-hungry phone for the life of the phone.