[alophawen]

The issue with Xorg is that it runs as root by default (there seems to be ways to run it as non-root according to Gentoo Wiki, but I'm pretty sure most popular distros runs it as root).

One of the selling points of wayland is that it does not.

EDIT: See child replies. I am outdated info.

[kevincox]

I don't think most distributions run X as root anymore. But it does generally have a lot of access as it can open apps and log keys.

XWayland definitely doesn't run as root, but still has a lot of access to any X applications that you are running.

[alophawen]

Thanks for pointing that out. I'm not up to date on this.