GNU/Matt 
Top of my almost 7 year old #LG #OLED #TV is degrading, pixels are going dark in almost like a narrow arc shape at the top, makes it look like the panel is sagging slightly. It gets a lot of hours with the kids as our main TV. Looking online this type of degrading appears common. Would have liked a few more years out of it
Have to watch it until its unwatchable, can't buy another at the moment. Hope miniled can solve its true blacks in time