This is one of those scenarios where it could be amazing if the whole ecosystem were mature from top to bottom, but the incentives aren't really in place to hav

This is one of those scenarios where it could be amazing if the whole ecosystem were mature from top to bottom, but the incentives aren't really in place to have it happen naturally. As an example: I'd love to be able to allow (and then revoke) Amazon's knowledge of my name and street address, but in the absence of GDPR-style regulation with real teeth (or the ecosystem being so mature as for Amazon to request delivery of a black box to identity XYZ and have some other company request permission and fulfill it) there is no incentive for them not to store anything I give them for eternity upon gaining access once.