Introduction[]
Whereas many operating systems have a built-in GUI and graphical environment...
The modern X has a vast number of features one would expect in a modern desktop environment, running on modern 2D/3D accelerated hardware.
XFree86 to X.org[]
Portability[]
With respect to MS Windows, the advent of cross-platform GUI toolkits made it so that a native X Server for MS Windows is less necessary.