I have an LG OLED from 2017. It started getting really bad screen burn/pixel degredation just after the 6 year mark (6 year warranty), I did a quick search on Youtube, and lo-and-behold, a whole bunch of other people, with the same model, started having the same screen burn-in issues at the same age!
It covers the middle third of the screen, top to bottom, and the entire bottom 1/4 of the screen with some odd spots as well, it's really distracting and essentially makes the TV useless (to me).
Yeah, it's quite disappointing when you buy a mid-high end OLED, despite keeping the brightness down and being careful with it, it just suddenly developed huge patches of worn out pixels one day.
I'll probably still stick to OLED though unless there's a new technology that can give me the same blacks and brights; can't keep up with all of the new marketing terms these days so not sure if there is something that can compete but last longer.
It covers the middle third of the screen, top to bottom, and the entire bottom 1/4 of the screen with some odd spots as well, it's really distracting and essentially makes the TV useless (to me).