That’s a complex question… but let me simplify my understanding and why I like using wayland over xcb…
At the end of the day, it’s all about understanding compositing; while it’s optional in X it’s kinda mandatory in W
In W, the display server is using this protocol and performs the task of the compositing window manager and in effect is merging the display server and compositor into a single function (i.e. read efficient usage of RAM/CPU)
So if the compositor is not an issue for you… which is kinda the mainstream anyways then X is default; but I like where W is heading and–for me–it has become like a mature teenager and behaves and delivers better than X… IMHO
Mmm… @realmain, I didn’t mention that “I installed”…
with “Some “wayland” apps are installed…” the meaning was that with my first-time-fresh install of this distro, there were wayland apps that were installed–by the install process–but as it transpires, not enough for me to see an option on a new session screen to actually start a W session… (hence the original post)
so in my mind, this was a way to answer @Strit’s question of “what are wayland apps” because it seemed that he didn’t know what they were…
so, my bad for misunderstanding where he was going
There are wayland packages installed yes. They are installed on any system. Not sure about “wayland apps”. As far as I know an application either supports wayland or not. But it will always support X11, since that’s still the defacto standard.
If an application does not support wayland, and is being launched in a wayland session it will either fail or launch through XWayland (which is kind of a translation layer between X and wayland).
But since Plasma does not use wayland by default, the wayland session for the display manager is not going to be installed by default, until it’s deemed stable enough for daily use.