Hi everybody! I just received the ONE UI 4 Update also including the January Security patch. Austria carrier unlocked. Everything seems to work fine 
Have to say I am pleased with the longevity of the 10 plus. Battery has remained strong for over 2 years with no obvious sign of degradation. And I leave this thing on a slow charger every night. I also appreciate the screen area which is quite large by current standards. Don't feel the itch to ditch this thing.