It scales as much as is needed, which is basically zero. The rate of growth in the number of products I buy is effectively zero. I use one shaving cream, one soap, one shampoo, one detergent, the same number I used 10, 20, 30 years ago and the same I will likely use for the rest of my life.

Also, I don't need a wall of buttons, a few inside the bathroom cabinet, a few inside the kitchen cabinet, a few at my workbench, in the garage, in my shed, is all I need.

I see Dash more like an experiment, it may not be the final product or disapear completely to become something else.

Even if I find this idea wasteful, I think amazon does the right move with just experimenting.

This isn't the scaling phase. Dash is also an API for automated ordering. And the button is a test to measure the usefulness of such API.Once there's data proving the idea, and an available API, Amazon and it's partners will scale this.

Some form of Dash exist with industrial manufacturing and assembly( some part call it bins) Where the no of items are limited ,where obviously it scales nicely. To think that the Dash is a solution for all the items is not productive. I think Dash may have market for consumer items like diapers,sodas, Ramens kind of stuff, basically which once you consume more frequently.

Writing it off might be premature, at least it is worth a try.

Which part of it do you think doesn't scale?