Does no one use VM's? I"m doing web development in my ubuntu VM. I don't have to worry about linux vs window environment problems and I can still test my local

Does no one use VM's? I"m doing web development in my ubuntu VM. I don't have to worry about linux vs window environment problems and I can still test my local work on windows. Languages - python, javascript IDE - Eclipse Source Control - Mercurial Hardware - Standard DELL with two monitors