I disagree that greatly reducing the mental overhead of visual processing is merely a cosmetic change. This may just be an issue of taste, or familiarity, but I

I disagree that greatly reducing the mental overhead of visual processing is merely a cosmetic change. This may just be an issue of taste, or familiarity, but I greatly prefer not presenting the same information twice. Once with characters and the second time with indentation. Why not just indentation? Also it forces people to make all hierarchical code blocks immediately visible, instead of being free to put them anywhere they like.