Because it's so reliable, does what it's told, and fast.
The safest filesystem I have found, ( almost impossible
to loose all data on a disk ). Most data can be recovered
easily from very damaged disks, which almost never happens
anyway.
Can invent any new screenmode at a whim, not just stuck
to whatever winblows gives you.
Multiple monitors and screens ... no problem..
Smooooooth true multitasking.
AND FUN.
WOL....