All LEDs had an issue with aging but it wasn't a big problem as they were used for back lighting or indicators. When OLED came about suddenly folk noticed the aging. It's not as if the displays failed but they can do what you see in reviews.

HOWEVER, you play a part in how long the screen lasts. Max out the brightness and just like in Plasma TVs you will see the issues sooner than later.

Are OLEDs perfect? Nope. Is there anything better? Not yet for mass production. For me I'd just dim the screen a little and enjoy the best screens ever.