Not true!! From the 7 series and onwards screen savers and auto dimming the screen after a certain amount of time reduces the risk of burn in...I have a LG 55B7 oled and have had it for over two years...never had any issues with burn in...use it for mixed content sky Q,gaming and watching 4k Blu-rays,apple 4k tv,netflix and so on...You will get screen issues on any oled. Especially having static images on screen for a long time.