Exactly, typography is a subject that is very dear to my heart. And while I agree that it may be a personal preference, there is a side effect to using double

Exactly, typography is a subject that is very dear to my heart. And while I agree that it may be a personal preference, there is a side effect to using double spaces: layout engines consider single spaces the default for their line breaking algorithm, and sometimes, when using double spacing, new sentences start at a new line with a space before the first letter which, in this very case, looks weird and therefore hinders readability.