RTings 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.
Having had OLEDs for a while now and never experiencing burn in even in my monitor I believe this issue is either very overblown by the small amount of bad experiences and requires a large amount of misuse before it becomes a problem.
I have seen burn-in personally in my couple of early OLED devices, and saw them pretty quickly, so when I was buying my only TV and seen that RTINGS tests, I decided on an LCD.
My OLED devices fared fine for a lot of years, but I'm not sold on OLED on large surfaces, and a good quality, dynamic backlit LCD is more than enough for my needs.
I still can't accept to use OLEDs in TVs and computer screens. Both has much higher duty cycles w.r.t. phones and tablets, and I hate burn-in.