Postulation presented as fact, I fear.
Having owned plasma and OLED sets (neither of which suffered screen burn), the former was massively more prone to image retention.
There are Hardcore [like if it was politics or sports] OLED haters that invent crazy horror stories.
Im an OLED user since 2016, i would NEVER go back to LCD, not a chance.
And I been using 55inchg OLED TVs as My PC monitor, not a living room TV buy doing the thing these people are scared the most of.
My 2016 C6 was given to my parents as living room TV in 2019 when i got C9.
Yes it has Bunr-In, its first 4K OLED, Curved and the last model with 3D [it has amazing 3D]
But the Burn-In is only visible if you run a test pattern, so in my view if i cant see it during normal use it doesnt exist