In order to avoid problems, I'd like to remove (and backup all plasma5 configuration before upgrading to plasma 6, then recreate what I can (eg I see people with old personal shortcut not working, but who cannot find how to edit them, etc).
However I find some in .config, some in .local, but mixed with unrelated applications for which I'd like to keep my configurations. So which configuration files should I remove/backup ? Thank you -- Erwan David