I’ve had my QD-OLED for a little while now and it has had quite a bit of static images on it without any trouble. From what I read before I bought it, OLEDs in general really don’t have a burn-in issue like the early models did.

From what I can tell they’re better than even plasma was at the end. And you’d have trouble actively trying to get permanent burn in on some later model plasmas. I used to service TVs and appliances. In most cases outside of using a plasma display for digital signage, I’d be able to run a swiping pattern for a little bit to get rid of the image retention. The only exception I really had for a plasma that was used in a residence was an older couple who didn’t have a widescreen source and only watched shows in 4:3 aspect ratio. They finally got the HD channels from their TV provider and realized they had the bars on the sides burned in (really the screen aged unevenly).