Agreed, as with most things in life "it depends" but my house and to some extent my extended property should be considered safe places where I have no duty to retreat. The perp has already committed trespassing and B&E. If they are not retreating when they find someone at home, knowing the homeowner may be armed, then I can assume they are also armed and represent a threat greater than property theft.

Also the duty to retreat assumes it is just my own life in danger, if there are other loved ones or pets in the house, where does that leave them?