Yes, OLED care is a concern, and I take the usual precautions: no fixed menubars, no tiling WM, rotating desktop wallpapers, and reduced brightness (which isn't a compromise -- anything above 80% makes light-mode content uncomfortable, and auto HDR raises the limit for actual HDR content).

Even if I were not taking these steps and generally abusing the monitor, I wouldn't expect to see burn-in yet, so I can't really speak to how the situation will develop.