avoid OLED if it's for gaming only usage. Screen burn is still there.
It is in extreme circumstances. If you're smart, it shouldn't be an issue. To be fair a lot of games now have dynamic HUDs which is helping with this. I do vary my content a lot and I am likely never to be playing FIFA or CoD for 1,000's of hours, like some would. My CX is pretty quick with the screensaver if something is paused - not the PS5 though, it just dims it, so I do try to keep game pauses to a minimum. My old Panny plasma had burn in but it was 10 years old or so. Sky pause button burn in was visible. My fault, really.