I have a laptop with an OLED screen (Thinkpad Carbon X1), which is by its nature susceptible to permanent image retention. It’s running KDE and Plasma 6.0.1.
I thought I would be safe from this “burn-in” if I just turned the monitor off when not in use, but then had it explained to me like this;
Burn-in on OLED screens is typically not about pixels being “stuck” displaying specific content, but rather about the uneven wear of the screen’s organic compounds, leading to varying degrees of brightness and color accuracy across the screen. When pixels display the same static image or color for an extended period, they degrade at different rates. Pixels that are used more intensively (displaying brighter colors, for instance) degrade faster than those displaying darker colors or turned off more frequently. This uneven degradation results in what is perceived as burn-in, where static images or elements seem to be faintly imprinted on the screen because those areas have become dimmer or have lost color accuracy compared to less-used portions of the screen.
If a screen displays a constantly changing scene, such as a dynamic screensaver, all pixels are being used more uniformly. Over a very long period, the entire screen might become dimmer as all the organic compounds in the OLED display degrade, but this effect would be uniform across the screen, making it far less noticeable, if at all, to the naked eye. The key issue with burn-in is the uneven degradation of the display’s pixels, which creates noticeable patterns or ghost images. Uniform use of pixels extends the usable life of the display and avoids the noticeable effects of burn-in.
When you power the screen back on, the burn-in will resume from where it was as if nothing had changed. To mitigate burn-in, it’s recommended to use screen savers, vary the content displayed, and reduce screen brightness, among other practices.
I do understand image retention is effectively not an issue with non-OLED LCDs and that screensavers have been gradually phased out in favour of just turning off the screen. xscreensaver still exists but larger environments seem to have dropped them. I suddenly want them now, though, and I’m not on X.
Is there any way to get KDE/Wayland screensavers?
Wayland made no plans to include screensaver features?
but people like… so screen saver will be around all time people want one .. 
