What people usually get wrong about text and typography is that there is not just one type of text, and therefore not just one type of typography. Dictionaries

What people usually get wrong about text and typography is that there is not just one type of text, and therefore not just one type of typography. Dictionaries have different typography from recipe books, which are different from math books, which are different from newspapers and so on. So saying that source code should not have its own kind of typography because it wouldn't work for some other textform is like saying that encylopedias should be like novels because it would be silly if there were arrows in front of words in novels that appear somewhere else in the book.