What you’re asking for is distributions to roll their own solutions instead of contributing upstream to make it better for everyone. Distributions and the organizations behind them frequently do things to make the user experience better, it’s just that the preferred way to do this is by making the projects they use better…which will just look like a DE version bump by the time it makes it to a distro changelog.

Don’t they typically do minor anti-burn in changes during idle, basically having a built-in screensaver? Still, an additional one could be nice for peace of mind.