Good points I think that we all may need to do things differently based upon our environment.
I do not have any hallways, doors to open or lights to turn on in our home. From my bedroom I can see the entire length of my home. But not every nook and cranny. So I practice pieing the house for a security check. John Conner suggested a night grab bag in an article awhile back, to hold cell phone gun flashlight etc. I considered it and passed because the first thing I do is put on my pants even if there is screaming my pants go on first thing. I can tell you from personal experience that few things make you feel more vulnerable than engaging anyone or thing with your johnson swinging free. So for the past 20 plus years pants go on on first thing. With my pants on go my carry weapon, a hi lumen multi function flashlight, cell phone and spare mag.
I do not turn a light on. Out of the unlocked safe by the door comes the shotgun loaded chambered and ready to go. The wife prefers the AR. She gets it and stays if she bothers to get up at all. A 2 inch crack in the bedroom door gives me a 26 yard view of the length of my home. The 30in computer monitor in the family room at the opposite end of the house provides me with adequate illumination. I move through the house with the flashlight on strobe I know where the reflective surfaces are I use them. I clear the house in fives sections. I start with my shot gun as I have no doors except the bedroom to open no lights to turn on. While I trust my XD45 to do its job it is a handgun by definition an ineffective man stopper.
Still even though a 12 gauge is an effective right now one shot man stopper. I still practice double taps, boom rack a boom observe repeat as needed. Remembering one is none two is one.
Anyone invading my sanctuary is a lethal threat and MUST be stopped now. I rely on my 12 gauge to do that for me.
I do practice transitioning from my shot gun to my XD and from the XD to the AR. I think the key is practice in your home. Do you have doors to open? Lights to turn on? Kids? Dogs? Toys on the floor? IMO all of that and much that I have missed play a factor in what weapon you should carry and how you proceed when something goes bump in the night.