I'm assuming by "plug" you mean electric outlet. I'm sure we'll never use that either. My husband's razor is cordless, it holds a charge for a week, and if he had to recharge he would tend to do it out on the kitchen counter. And I don't use a blow dryer, or electric toothbrush.
I haven't tried out the shower yet, but it seems to me that the hose is attached to the wall so that you can't pull it out to its full length. We had that in the B+ we owned, and my husband took the screws out of the wall to free the hose up. One of the advantages of a handheld shower is the capability of spraying it anywhere on your body, head to foot.
We rarely use our B for more than a couple of days, and if we do, we would stop in a campground with showers. And we've been known to overnight in a motel so we can have a really good shower. It may be we never use the shower -- but still I think we should have gotten the cover for the window.
Despite limited storage space, we're getting used to our Plateau. It rides and handles very nicely, and we like the bed. I think for winter we may dig out the old sleeping bags and use them instead of sheets and light blankets.
I don't think I reported here that we went on an overnight campout, and the electric all failed, except the bed mechanism and the fridge. We couldn't run the furnace, and we had the above-mentioned light blankets, no heat, no generator, only a tiny flashlight, and it was at least 40 or less outside. In the middle of the night we packed up and went home...we were freezing to death. In the light of day my husband found the circuit breakers that had tripped. Eventually we'll get used to all of this.