I get it, you don't like the pointless icons. Some do. Often when having a homogeneous naming structure with long filenames in NerdTree, it's nice to be able to say, "Oh this is the CSS file" without having to hit a capital A to expand the "drawer" to see what type of file it is. For the record... I don't own skinny jeans, and I'm probably far too old to be a hipster.