I have a friend who bought an iPhone X on launch day. He’s used his phone with the screen on full brightness for close to two years now. Just suddenly after updating to iOS 13 he noticed his screen suffered burn in, but it show the home screen with the keyboard in a somewhat unusual state. When he uses it on full brightness the screen is usually displaying moving content and not static images. Could this possible make the screen more susceptible to burn in from small events over time (how it was suck at that screen and he doesn’t recall seeing it stuck like that either) It’s not horrible but it’s noticeable. It’s not bad enough to warrant a $279 screen replacement.