I have never owned an electric can opener. In fact, I have never been to someone's home who had one. I had thought they were something only a few people used in the mid-29th century, but no?
I would rather see more function in fewer, simpler things though, which is more the lifestyle I see happening in the here and now. French press and pour over, cold brew..those are more the norm now in daily life than automatic drip coffeemakers that heat water in plastic.
Goodwill always has George Foreman grills, cake pop makers, and other one-use Teflon coated appliances, and cast iron has seen a resurgence in interest instead.