I like vertical white space in code, and so I usually use blocked comments right above the relevant code. I think the side-by-side style has gotten less and les

I like vertical white space in code, and so I usually use blocked comments right above the relevant code. I think the side-by-side style has gotten less and less practical as languages have become more expressive and lines have become longer (also due to much more screen space). Just a working theory though :).