We use cloth racks.
I have a small apartment without a balcony. I do not have room for a washing machine and/or drier or space to hang laundry.
If the washing machine is in the basement and the drier, too, why are you arguing about electricity prices and smart grids and when to wash and when not to wash if all that does not even apply to you?
Because I can see further than the end of my own nose and can see that what may work for me may not work for other people. The thing about smart grid is that it needs to be controllable. I am point out instances where it demand is not as controllable as you think.