I'm not a fan. My iPhone X got burn-in surprisingly quickly, even though the screen was only on a couple of hours a day.

My work iPhone is a 6, so it's LED, and even though I keep its screen on eight hours a day, there's no burn-in.

I’ve had one a year and use it a lot. Never any burn in.

Where do you see burn in? Light or dark screens?

Everywhere. Most prominent are the unlock icon and the flashlight icon and the camera, but there are others; and some text.

Any time there is an area of flat color, or gradient color it really shows.

Have you tried taking it to an Apple store? I have an iPhone XS and I am 100% certain this doesn’t happen on mine.

Agreed. The reported behavior sounds more like defective hardware. I have my original iPhone X from launch and have used it for hours a day. Battery is a little beat up, but the screen is still perfect.

Am I the only one who sees visible flickering on the iPhone XS OLED screen? Fine white lines on a black background are terrible. It reminds me of using an Amiga in interlaced mode.

That's probably what is usually referred to as "black smearing," which affects most (all?) OLED screens when using a completely black background.

I ache for an OLED iPad.

Yeah, but I'd rather a super high refresh rate over that. LCD does that better at the moment.