If you are on Opensuse Leap, Debian or probably also Kubuntu (Ubuntu LTS), no it wont affect you.

Stable = unchanging bugs, not working packages.

On Kubuntu you may get it with "Kubuntu backports" but really just no.

If you are on Fedora KDE then you will have Plasma 6 in a few months! The same probably for Opensuse Tumbleweed, Arch, etc.