But upon starting it up I lost all windows decorations (KDE), had to restart my session and lost the things I was working on in my terminals.
How can launching an app cripples the whole desktop ? (not that this have anything to do with the app to me, it's a plasma thing)
First thing I look for was support for vim keybinding, could neovim be used as the backend editor ?
It's not the first time something like that happened to me but I would never have had the patience to investigate !
Can confirm unchecking that setting solved that problem.
Compositing should only provide the fancy effects like Wobbly Windows and window previews in the alt-tab switcher etc. Not sure why this is causing KWin to crash... You can use Alt-Shift-F12 by default to toggle compositing.
But if you're not doing anything more graphically intense than playing turn-based or slow-paced video games then I guess you can use that option to permanently leave on compositing.