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.
NixOS. You can change DE by editing a couple lines in your config, running sudo nixos-rebuild boot and rebooting
As in, build a NixOS VM that's otherwise the exact same as your current system but with a different DE enabled.
nixos-rebuild build-vm
Thanks for explaining. I've come across build-vm and I should really try it out. Rebooting just to roll back isn't fun
Well, you can roll back with a switch too; no reboot required.
The VM protects you from accidental state modification however (i.e. programs enabled by some DE by default writing their config files everwhere) and its ephemeral nature makes a few things easier.
I've had some changes where I had to logout after a switch, so this should help sometimes.
All modern distros let you install them all and just select which one you wish to use from the login screen. You don't need NixOS or anything specifically to do this, in fact it's easier on other distros because usually nothing more than installing the packages is required, no config editing, rebuilding or even rebooting.
It would be best to try every single one separately, otherwise you'll have dozens of programs that do the exact same thing, like file explorers.
That said, with Fedora you can list available desktop environments using the default package manager, dnf. In a terminal use the dnf group list command to list all available desktop environments:
dnf group list --available *desktop
Install the required desktop environment using the dnf install command. Ensure to prefix with the @ sign, for example:
dnf install @kde-desktop-environment
After trying the DE, you can remove it with:
dnf remove @kde-desktop-environment
Thought fully switching a desktop environment up to your login screen and all is a little more complicated and can end up bricking your system if you don't know what your doing. For those cases, you also would need to swap the system identity. Not entirely sure what was the command right...