I had a large number of the dash buttons (likely two dozen or so), which I always found to be extremely convenient. When I was running out of some product, a simple press of the button was far more convenient for me than remembering to pick it up the next time I went to the store.

When they discontinued the service, I put all the buttons in a cabinet drawer hoping that they could be "jailbroken" to act as an arbitrary IoT button in the future (like the official Amazon IoT button[1]), but as far as I can tell this never came to fruition (barring a few exceptions) and they're basically doomed to e-waste.

[1]: https://aws.amazon.com/iotbutton/