I want to switch to another DE on Fedora, from KDE to COSMIC, is it possible to switch in some simple way, kind of with rpm-ostree or something? I’ve searched the web but only found info on doing this with Atomic desktops, but I’m not using one and not planning to yet
I don’t have Fedora around, but in general just install all the desktop environments you wish from package manager. Most (if not all) login managers support changing the environment on every login. I don’t remember exactly how that works on plasma login manager, but there should be a pretty obvious menu item to pick from before inputting your password.
You obviously need to have autologin disabled in order to see the selection screen.