I'm not saying KDE should do one thing or another, I understand that maintaining code, even unchanging code as you claimed, takes effort.
Yes, they're going to force me to switch to Wayland on this machine. I'm on X because I need autokey, pyautogui, and TeamViewer. I need to look into alternatives and switch, except I don't have the option of replacing TeamViewer.
I'm not really partisan in the whole X vs Wayland jihad, I run Wayland on my 2 other machines and don't notice any difference.