I think some people forget that CRT's had issues with burn in too, Windows is packed with "Anti-static" technologies, the original/traditional one being animated screensavers, though I can see why many have forgot about them(And their original purpose) after a decade or so of LCD dominance. Animated wallpapers, taskbar autohide, ect, fit the same bill(And have also been a part of Windows for a couple of decades).
But yeah the issue with OLED burn-in was exasperated by blue OLED's much faster wear down compared to green/red, though this has been dealt with in many ways from firmware to pixel layout to just improvements in silicon optronics.
You could definitely still "force" a burn-in on an OLED screen but at this point it'd likely take some concerted effort and time, or a severe lack of care and much more time.