I just noticed that, once I approve someone for comments, I receive absolutely no notification of any new comments they place. So if you’ve been commenting on posts here and wondering about my silence, it’s because I didn’t realize there was anything to read!
I’ll have to rummage around to see if WordPress has a setting to notify me of all comments, not just ones awaiting approval (i.e. from unapproved users)
You can use a RSS feeds reader, like I do… there’s a comment feed as well as a posts feed. You may also be interested in it: https://en.support.wordpress.com/comment-notification-email/