Just a hint for some users: if you slightly lower brightness, your screen will last a ton more; be it oled, be it backlit (IPS, etc.)
Using my S95B OLED TV as monitor for like 2 years now. Settings: Warm2 and the brightness is set to medium, 28/50 and 0 burn-in and this is despite being the first OLED generation). Any power saving settings are disabled and the TV auto-dimms to prevent burn-in, so a burn-in is basically impossible, unless I'd try for force it.
@heffeque
Yep, the same goes for our eyes :)