I don't like containerisation because it leads to bullshit like atomic distros. I don't want a spicy Android.
Steam OS has some cool elements like the menu, the in-game side panels and the game mode/desktop dichotomy, but incremental rolling release is utterly deranged from my POV as an Arch user (btw).
Say Plasma "breaks" - a wiki will not help fast enough.
I'm not trying to defend rolling release for a gaming console, but give me at least the option to decide for myself whether I'm ok with breakage or not. There is this kernelspace NT driver that I wanted to try, but I couldn't because pacman is locked.
I'm currently trying Fedora Kinoite and from the get go the hassle of getting a proper Firefox+codecs to watch online videos feels like a major step back.
Then you have the issue of installing software in flatpack (is: vscode, texmaker) that are either not fully working of need to have their access tweaked. Atomic distros appeal is to "just work" it doesn't seem like it does.