alt Hacker NewsRTings has done multi-year burn-in tests and OLED TVs have an exceptional lifespan before burn-in these days, I honestly don't know what motivates this particular concern any more. You'll probably have the caps fail before you notice anything, maybe even multiple rounds if you recap it.
I have looked to the same burn-in tests actually, and they were just starting doing it. Some of the screens got burn-in pretty quickly.
Yes, screens have improved vastly since the first days, but my life expectancy of these devices is much longer than a ordinary consumer. I don't change a TV every 5 years.
Yes, my duty cycle is much lower than the ones gone through testing, but having one less failure point for my screens is always better. Also, I'm not a nitpicky person about contrast numbers and whatnot. If I enjoy the thing I'm occasionally watching, I'm more than fine.