NixOS might not be for you, it is horrible if you don’t want to adapt to it. But if this happened on NixOS, you would just reboot into the state of your computer before you ran the update. Or if it’s just a program like VLC you could just close VLC switch to the previous generation and open VLC again

He means running xwayland in rootfull mode as the one app run in cage

I have that one too, but my alias is called icat