[mandeepj]

Maybe there can be an ultra-sonic laundry machine

[ozim]

I guess a nuclear submarine doesn’t have the same power bill sensitivity as common household. ;)

[cyberax]

There are! And you can buy them for a couple bucks.

The biggest downside: rinsing. You have to do it manually. And no, just refreshing the water and letting the ultrasonic emitter run will do nothing. And doing it manually takes a surprising amount of time.

[mandeepj]

Thanks! I googled after posting my comment here. No viable path with ultrasonic washers.