I just cited markdown as complement to git. Git is a command line tool as is SSH (don't talk about GUIS for Git, that is not the case). I never said Unix is used exclusively by extraordinary people only (Ubuntu and others are an example), but the majority of people still use Windows.

Have an Unix/Linux background makes it easier to get started because you already know what they are talking about.

My personal opinion? Windows sucks (just to be clear, that is me).