What's the most stable distro for trying out plasma, any recommendations would be good. Ideally I'd like to run Steam games. Another question, does plasma use Wayland?
I would agree that immutable atomic linux desktop is the future. I would go broader than Bazzite and say you can pick from whole range of similar flavors that might fit you a bit better https://universal-blue.org/ for example https://getaurora.dev/en is KDE.
It's worth saying that one advantage of atomic linux is that you can easily switch between the flavors.
Ah my bad, I never looked much into it I guess (haven't used a full DE in years). Apparently neon is built on Ubuntu and KDE Linux is a new immutable-based thing. (They don't list it at https://kde.org/distributions/ and it's not exactly easy to search for with that name..!)