As title says. Obviously I could setup different virtual machines or spend the time and install all the DEs in one VM if it is even possible without breaking the OS. I'm wondering if there is an already made iso or something that installs all the maintained DEs for trying.
If that's happening on your distro then try any of the modern big names and it'll be fine. Left over cruft being a problem beyond some extra disk space usage is a thing of the past.
That can't happen on my distro.
(I use NixOS, btw)