Well I guess in this weird household you wouldn't have that many, you'd just have the dirty one and the clean/using one each?

But you have to go to something close to 'we only eat cereal' for it to sort of work, which is crazy (and not healthy).

It's a bit like telling people to be like Steve Jobs and have a single outfit, your laundry will be so much easier, your wardrobe so much neater: sure, but it turns out most people actually don't want that... So it's really neither here nor there what problems it might solve.