SUMMARY Systemd released version 249, which introduces a new update method using A/B partition schemes. KDE should work on using it (though it sounds like an OS-level feature, so KDE probably can't support it allone, but needs an OS supporting it. See https://github.com/systemd/systemd/releases/tag/v249
Is this something that KDE can do even? It seems like the kind of thing that should be supported by PackageKit back-ends.
This is not something the KDE team has to do