Going all-in on a Wayland future
blogs.kde.org
Well folks, it’s the beginning of a new era: after nearly three decades of KDE desktop environments running on X11, the future KDE Plasma 6.8 release will be Wayland-exclusive! Support for X11 applications will be fully entrusted to Xwayland, and the Plasma X11 session will no longer be included.

After nearly three decades of KDE desktop environments running on X11, the future KDE Plasma 6.8 release (due early 2027) will be Wayland-exclusive. Read the FAQ in the link to find out what this means for you and the future of KDE.