The Xorg package for Arch is a meta-package, meaning it’s actually a large bundle of software that includes everything that you’ll need for Xorg. All graphical applications, including your desktop environment, are built on top of Xorg. It is a common problem for a Linux installer to mismatches the driver because graphic card vendors do not supply the latest drivers to Linux (mainly to MS Windows) or make their drivers complying with the standard. In your nf you will see what driver Mint has selected for you. Here is what the Xorg startup log will look like for an nvidia card and the nvidia proprietary driver. I managed to get the intel driver working by disabling DDC in /etc/X11/nf: Section 'Device'
So, from a developer interest point of view, Xorg is abandonware.
Given the serious and perceived unfixable security problems with Xorg, Keith went on to start Wayland. Keith Packard was the main developer of XFree86 before he fell out with the steering (or rather parking :-) committee, and went on to set up Xorg.