The latest version of Debian (10) stable packages version 5.14.5 of KDE Plasma which is ca. 1.5 years behind the latest release. I'd like to use a newer version which only is a few months behind the latest release because I'd like to use new features and bug-fixes.
I don't want to switch to another distro that uses a newer or the latest version of the KDE grahpical workspace environment (and other KDE software): I really like Debian - mainly its thorough dedication to entirely free software, stability, security and large user-base. In the long run I'd prefer if basically all improvements were to be made to Debian itself instead of other distros. Furthermore, I'm asking about Debian stable because I'd like the OS to be as secure and stable as possible and therefore not use or recommend anybody to use Debian testing by-default (stable should probably remain the default variant to use for most) instead. Lastly, I'd like to not create a "FrankenDebian" as described here.
I think having a very outdated version of KDE Plasma (along with some other major KDE software) is one of the main disadvantages of Debian which is why I consider this an important issue.
It might also be relevant that the bug-fixes would be consistent with the goal of stability of Debian stable - so a more recent version often means better stability (or at least it could mean that).
What would be needed by Debian to package newer version of KDE Plasma?
More testing via more users more quickly and more thoroughly testing the latest version of KDE Plasma in Debian? More devs reviewing code and routine tests of code? Something else?
If it would be better or easier to implement an option for users of Debian stable to use more recent versions of the KDE graphical workspace environment what would be a way to implement such a thing? For example what would be needed by Debian to add a new option to the installer that allows users to choose having a newer version within Debian stable after choosing KDE to be their desktop environment and to allow upgrading to a newer version?