Wayland has much more up-to-date graphics technologies behind it to put it simply.

Xorg(and the x server protocol) is very old and like most long lived software has quite a few warts and quirks.

Wayland has been “the future” for like 10 years (though it’s quite a bit older). It’s only now starting to reach a critical mass where things are starting to change so it might feel a bit of a mess at the moment.

Noob here, also curious to this…

Better multimonitor support, VRR, and HDR are some of the promises I think. I want all of these things but not enough to switch away from Linux Mint. I’ll be happy when Wayland makes its way in over the next couple of years.

Because it is mess or a program. If nothing else Wayland has much better security. However, X tends to be less performant and harder on power usage. It also has poor support for input devices such as touch screens and is unreliable with multiple different monitors.