The trick is to never upgrade. Sure, I have to deal with 'Allow paste?' bug, but at least I don't have to deal with new bugs. I wish I could install an old version of iOS on a new phone. Perhaps I shouldn't buy a new one every year...Upgraded an old iPhone 12 to iOS 16.3 and it's extremely laggy, even the animation when you return to the home screen lags out. I don't know if Apple is again throttling phones so that people upgrade, but I have no problems whatsoever on my 13 Pro Max. The 12 is set up as new and has nothing on it except for stock apps.