You should have implemented this long ago.

Too bad for me, you implement this only after my account got hacked.
My hacked Dorky account underwent both password and email change less than 14 days ago.
And the last time I check my old email inbox, I don't see any notification there.
I suppose it is now 100% gone.

Update:
So I received notification to this "Dorkie"
But I received no notification to "Dorky" when I try to recover password for this username.
The old email address used by "Dorky" is the same as I used it with this account.

Update #2:
Pissed that my Dorky account lost to this.
Nevertheless let's hope this added security notification will help to significantly reduce (if not totally eliminate) all account hacking.
It may not be able to save my "Dorky", but at least it may save many other accounts from now onward.