I am pretty sure that xmonad, or tiling window managers in general, while popular are not the #1 in popularity on Linux so I will have to disagree with you again. You have many alternatives more featured than xmonad and I am very sure you know many of them already.

Going forward please keep those views to yourself. There are many developers putting a lot of effort, in many cases volunteer effort, to advance Linux on the desktop... which is already far better than many people care to admit.