> Also I seriously doubt the hosting costs are more than a rounding error for a multiple-hundred-dollar appliance.

Ok but...

> then think if they already have that they can save some cents on buttons.

Isn't this a rounding error as well, on a >500$ appliance?

How can we have at the same time dishwashers with no 7-segments display because it's too expensive and other brands with wifi on every model? It cannot be just for costs, there ought to be marketing reasons behind this.