If it required waiting for apps to provide this integration you would be waiting 10 years for it to mature. There would logically be some benefit to looking at the window before compositing + saving text from none visible windows and avoiding recapturing content which hadn’t changed.

If this was actually an open source app with strong privacy settings that you could opt into it might be useful.

This often means unofficial builds that aren’t from the developer that sometimes have sandbox specific issues the devs didn’t contemplate because they don’t actually do flatpaks. If someday the random bob who is neither the original developer nor some trusted individual connected to the distro is hacked they may push out a malware enabled update that pwns all the people who automatically update in short order. This doesn’t seem like a security increasing feature.

The article is 3 years old and some things are only presently being fixed NOW and due to filter down to stable distros in 2024. Furthermore wayland proponents have been claiming its totally ready for prime time and not broken at all since 2015 while promoting AMD GPUs that at that point in time still sucked hairy balls.