What is the benefit of /etc/apt/sources.list.d over /etc/apt/sources.list

I know this question has been asked before, but I do not accept the answer, “you can clearly see custom additions”. When I add ppa’s (which I have not done in years), I hit a key on my keyboard labeled “Enter” which allows me to add an empty line before the new entry (I would even add an explanatory comment, but I am a tech writer, so ….). I like my sources.conf clean and neat.