Same, only reasons I had to move to KDE were, GNOME crashes when both my monitors are off (so, every night when I go to sleep), and tray icons are terrible (as GNOME intentionally doesn’t support them), the extensions are all very lacking in features compared to the Windows tray (kde somewhat matches almost everything except being able to reorder the icons).
The ArcMenu extension is by far the start menu I’ve liked the most out of all options on linux, and it saddens me that there’s no KDE plasmoid/widget variant
Saying full source code leaked is a little wrong.
Plugin was always open source, and all plugins for that framework are required to be open source by the framework’s licensing.
Doesn’t change the fact that once one person did it, the code was available for anyone, though, you’re right.