I'd love to see a detailed list of the features of this dollar exchange system that make it preferable to any of the relevant software systems currently in exis

I'd love to see a detailed list of the features of this dollar exchange system that make it preferable to any of the relevant software systems currently in existence. My guess is that such a list can generalize to HCI and help reveal some of the garbage assumptions behind a lot of common software (esp. cryptography-related software).