I've been asked "what's the danger of having Samsung datamine my washing machine/dryer/dishwasher". And, unlike say internet viewing habits, it's difficult developing an appropriate threat model. Anything/any ideas I can use to explain to them

It’s not as bad as your tv or your phone but it normalizes the practice. It also opens your local network to all kinds of vulnerabilities because of the world class level of quality and safety whatever smartness in the dishwasher was programmed with. And if it’s a smart anything, it probably comes with the app to make it work, which opens the gateway to our phone and its treasure trove of data.

So yeah I agree with your friends that data mining your dishwasher in itself is rather innocuous, but why allow it to happen altogether and open yourself to all the above?

> why allow it to happen altogether and open yourself to all the above?

According to them, for laundry, they don't want clothes to sit there longer than necessary without being dried or folded. For the dishes, they want to make sure that they remembered to start the dishwasher without having to go check