I don't talk about mixing spaces and tabs. I talking about why don't we indent with tabs only? Spaces are good for separating tokens in code, but indentation is not for that - indentation is for making the structures visible, sometimes it is easier to read with smaller amount of indent, sometimes it is easier to read with larger amount of indent - based on my experiences. Why then to make the coders life worse than needed? (On the other hand I do like Go's approach for this: using 'go fmt' you can make your source file well-indented/aligned. sigh