Georgia has had the castle doctrine for some time. So what happens?
Well, in the suburbs where people generally are armed, break ins happen during the day generally. Not at night when armed people might be home.
Georgia also just passed the stand your ground law that eliminates the run away feature of using deadly force. It also expands the rules under which you can use deadly force in public to include protecting your property and other people's lives. It also creates prosecution immunity for the shooter, if justified.
Success is the ability to go from one failure to another with no loss of enthusiasm..W. Churchill