Thanks!

You intrigued me in part 1, I’m looking forward to reading this. Do you have an RSS feed or mailing list I can subscribe to get updates in future?

It’s most useful for something like /home so you have a full backup of your home directories without having to worry if some app has dumped its settings on a folder you don’t have marked for backup. But also backing up / is useful because it gives you an easy recovery in the event of say disk failure. Just restore the entire system from a backup.