I don't get this debate at all, LCD has less burn-in risk. OLED will always be an inferior choice if they can't fix its short lifetime. Or, I guess, this fits well with planned obsolescence: higher fidelity, shorter life time
I also have an early generation 65" B series LG OLED. I wouldn't say there's burn in per se, but you can notice some inconsistencies at 50% gray. Even still it's more uniform that any LCD display I've seen.
I think we'll dump LCD when we get good at manufacturing smaller mini LEDs.