Add an extension button underneath someone's comment that can allow them to comment on that comment.

Just like youtube, you can reply back to someone's comment. But why do I ask noteflight for one? Because I had to tag people's usernames to reply back. And not only that, it makes the comment section a lot more cleaner.

I'm the type of user that replies back. So it's really useful if we could have one of those otherwise I will have a long log of comments in my score.