in my lifetime i have never once said, "I wish I could fold in my side view mirror."
I would love power folding mirrors.
Every time that I pull into the garage in the roadster, I manually fold both mirrors before going into the house.
My kids always end up banging their heads on the mirrors in the garage. With them closed, I have no issues.
Also, I cannot count the number of times that I have seen people driving around with a missing mirror or worse yet, one hanging from the side of the car via the electrical. People inevitably back the mirror into the garage wall when backing out. If you are in a hurry, then I can see how this might happen. Not to me, but to my wife or to my kids when they become new drivers.
My Jeeps are tall enough that the kids do not hit their heads. Thus, it is not a big deal. It still would be nice to have. Power is always better than manual. Since you already have electrical going to the mirrors for adjustment, dimming, and blinkers, adding a motor in the door to fold the mirror would not be that much more of a pain for the manufacturer.
I never thought that I would want memory seats, until I got married. Now, it is mandatory for me. Power folding mirrors seems to be kind of the same deal. They sound useless until you find them useful.
Now, headlight wipers. Never will I say that I need those.