Thank you for posting that, I appreciate it. Interesting read. I went through the whole thread (all 167 comments, lol), and my takeaways were:
1 - burn-in is absolutely a real thing
but
2 - most people won't have to worry about it
and
3 - it can be avoided entirely if you know what you're doing.
One of the most damning bits of evidence in support of #1 was this link to a twitter page:
https://twitter.com/demii_7/status/1018684648090550273 - I mean, there's no arguing with that photo. And several redditors mentioned they'd seen similar screens on their own phones.
But - the same pic also demonstrates why most users don't have to worry. The phone in that photo was a display unit at an AT&T store. Display phones are on maybe 12 hours/day, constantly, at full brightness - and they're (usually) displaying the same static picture all (or most) of the time - such as those icons at the bottom of the screen. So, in an extreme case, burn-in is clearly a risk.
But how many people actually use their phones like this? Or even remotely like this? The redditors who claimed to have burn-in issues admitted they, too, often had their phones at full brightness for long periods of time. For example, using google maps every day for hours at a time, in a car (which likely means full brightness).
The vast majority of folks stated they experienced no burn-in, despite heavy use of launch day phones. And I think most iPhone owners will fall into the same bucket. I mean, if burn-in on iPhones was truly an epidemic, it would be all over the news. You wouldn't have to dig for a reddit thread to learn about it.
Yet, obviously, this is a real risk...and one that most users are unaware of. Avoiding the issue is easy, but you do have to be cognizant of the circumstances that could cause it. There will inevitably be people out there planning to use the phone in some manner that involves static screens at full brightness, for long periods of time. I hope they learn about potential burn-in before it's too late.
Veering back on topic: thanks again
@RMP28 for providing that link. Personally - for
me, and the way I use my phone - the risk of burn-in isn't any kind of strike against OLED. It's not something I'd ever have to worry about. However, I think it's important that people know the risk exists. So, it's worth mentioning when comparing the XS/XS Max with the XR (like in this thread), because, inevitably, some percentage of buyers will want to use their phones in those "extreme" circumstances.