I’ve been using the always-on display of my OLED smartwatch 24/7 since 2022 (Samsung Watch 4 Classic). Burn-in is a non-issue. The watch face goes into AOD mode when you’re not looking at it; I’m not sure which burn-in protection features are being used but they work well cause I can use the same watch face for months at a time without any signs of burn-in.
I’ve been using the always-on display of my OLED smartwatch 24/7 since 2022 (Samsung Watch 4 Classic). Burn-in is a non-issue. The watch face goes into AOD mode when you’re not looking at it; I’m not sure which burn-in protection features are being used but they work well cause I can use the same watch face for months at a time without any signs of burn-in.