The pixel refresher got rid of any burn I started seeing on the OLED (the PS Sign andsome other shyt)
Pixel refreshing is nice to have (especially since uniformity can masks degradation), unfortunately the burn-in it is something that is part of the technology.
As far as I know, Samsung has a little leg up on reliability as their QD layer allows better light conversion, thus doesn't need to drive the LEDs as hard and making them last longer. But everyone should get a warranty on an OLED TV they buy.
On another note, I was at a store nearby and looking at the OLEDs. Just makes me want those Micro LEDs to pick up more steam. Can't wait for that to come out since it will solve almost all issues aside from sample-and-hold inherited "flaws".