I have a smart gas range so I can remember if I left it on, and to automatically turn on my exhaust fans (that lead outside), to get rid of any pollutant concerns.

I’ve attached power monitors to my clothes washer and dryer to make them a little smart, for notifications when they’re done (auto dry feature means it’s not deterministic). Most people wouldn’t want to diy it.

Where I am, electricity is $.65/kwh during the day and $.19 at night. If my clothes dryer were electric, I would definitely run it on a schedule. I wish I could run my dishwasher in a schedule.

These all seem desirable, to the average person, and usually only available with the smart models.