The professional reviewers and Unopinionated say burn in is rare, there are people on social media that agree with Michael7877, and there are many people that are somewhere between these two extremes. Everybody has to decide for themselves who to believe.
There are many people who have studied TVs as much as you that come to different conclusions than Michael7877 regarding burn in.
You have told us in previous posts that you are very knowledgeable, you've done a lot of studying, burn in happens linearly, the burn in rate is due to many factors, burn in will happen to all OLEDs it is just how soon, that rtings.com burn in tests on C7 TVs proves your point, and this is how you have to babysit your TV if you want to slow down the inevitable.
It is evident you are going to have to fill your need for affirmation from somebody other than Unopinionated.
The TVs with burn in and the use which caused it is all the "affirmation" I need, and all anyone should need. It's always very similar.
I'm not on an "extreme" - the risk of burn in is understated. It's exactly how I say it is.
If you use the TV on medium high brightness (~80%) and stay on a channel with a bright static element, after no longer than 1000 hours you will have burn in. If you don't have burn in, you don't have 500-1000 hours. Some people get there in a year, some 5. Some never.
If you don't want burn in and want your tv to last 20-30k hours (which is the expected lifespan before noticable general dimming of TVs run from 40-75% brightness SDR, 100% HDR), you have to use only video streaming services with no overlaid logos. And dim the Netflix menu when you're browsing to not get "NETFLIX" scorched into the bottom right of your display.
It'll happen in 11 years with 5 minutes menu time/day.
Add 2-3 hours a month from accidentally leaving it while you make dinner or take a crap and forget, turns into 6 years.
Now leave it on overnight when you fall asleep a few times, that's 3 years. The logo is even in the previews netflix uses as screen savers... They must hate oled owners lol. We know which service we're using! and don't need the reminder over the bottom right!
Anyway, point is, they are delicate machines.
Also, you should consider that a reviewer making their living calibrating a lot of OLEDs has a conflict of interest. If he said you'll probably have burn in after 4 years orĺ less, people would be less likely to get a calibration done. I'm hesitant to get my tv done because I know in a couple years with my use, I'd have to spend $400CAD again.