I appreciate the amount of research that went into it, but in reality this all falls squarely into domain of pedantry, because you close void tags either way and move on to more important matters.
How to close void tags is more of a leitmotif to learn more about the whole subject, and the reason for investigating it. If you're not interested in understanding the core features of the markup language you're using, then this article is definitely not for you.
