for context im running a custom image with the login screen active so the exit to desktop option takes me to the login screen (as the switcher kinda crashes on my weird desktop system) hence why i cant test
no idea sadly, all i can tell you is that all the development upstream is happening on wayland these days, there are some things wayland cant do that X11 can like global hotkeys, but because of the security model of wayland, global hotkeys is something the DE has to implement (and apparently KDE should support global hotkeys, just dont know how to set it up as im in the process of switching over myself)
probably because back when it launched wayland was missing more functionality you would have expected it to have and X11 was most likely choosen for compatibility so you would not get people having issues sharing their screen in discord or streaming with obs (i know there was some issues with this on wayland at some point with wayland, but just using it as an example)
these days wayland will work for most people completely fine, while X11 is favored by people using nvidia due to well... nvidia being nvidia, especially if you have an older card
here is a situation that makes wayland better for me i have an amdgpu and an nvidia gpu i tend to send the nvidia gpu into virtual machines so my host never uses it except on the first boot. X11 may crash with the nouveau driver on some desktop environments because it might default to the nvidia card using the nouveau driver even though nothing is connected to it. wayland will query the cards and go "oh ok, there is stuff connected to card2 which is using amdgpu, i guess this is the actual card used for displays" and then just work so for me wayland is favorable going forward
you can try it, the deck should support wayland fine from my knowledge, but kyle might know more since i believe he runs bazzite on the deck? you can just run the command again to toggle wayland off
Because it's not something we'd suggest a user do. X11 is used on Deck as Steam Input doesn't fully support it yet and even with extest, there's some off behavior. You're free to try it though
gnome-remote-desktop works on wayland as a server using rdp (used this on chimeraos) think krfb works on kde as vnc host on wayland, havent tested it yet though