I would guess the notification system is yet to be built, as opposed to not happening?
Most of the back-end is already built, but there is no useful place to surface this data yet and it has dependencies on other features we needed to have built (such as actually sending emails, having permissions protect the notifications, etc).
Most of the back-end is already built, but there is no useful place to surface this data yet and it has dependencies on other features we needed to have built (such as actually sending emails, having permissions protect the notifications, etc).