Question: why xfce is the best linux desktop?
Answer: Lightweight construction. Xfce has a very small memory footprint and CPU usage compared to some other desktops, such as KDE and GNOME. ... 
Simplicity. The Xfce desktop is simple and uncluttered with fluff. ... 
File management. ... 
Stability. ... 
Elegance. ... 
Terminal emulation. ... 
Configurability. ... 
Modularity.