About an hour ago one of my answers was edited.
However, I didn't get a notification of the edit in my inbox.
I spoke to some other users, who told me they are receiving notifications of edited posts. So I suspect it's something in particular with my account, my settings, or something utterly stupid that I did while completely smashed one weekend and forgot about.
Whatever it is, I'd love to start getting these notifications again.
After some testing, I determined that I am getting notices for suggested edits, but not for edits made by 3K+ users.