Thank you for the intro, that helped.
Glad to hear it was helpful.
Sounds like Mint not having it is relevant
Yup. FWIW, there's also the security argument; I.e. X11 makes keylogging trivial, while Wayland provides protection against it by default. Having said that, there is experimental support for Wayland in Linux Mint. But, ideally, it needs more time to cook.
Thank you!
FWIW, I don't think any of these are directly related to "immutability"; i.e. in the case of Bazzite, some subfolders of
/being read-only at runtime.