There are plenty of uses that don't involve user data, or that would rightly be considered a permanent part of public record.
Whether ID->DB links are sufficient will remain to be seen.
It's also unclear as to whether the right to erasure/modification applies to both public and private data. If the blockchain is never shared publically can it contain any user data?
Maybe I should expand this thought experiment as an article.
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There are plenty of uses that don't involve user data, or that would rightly be considered a permanent part of public record.
Whether ID->DB links are sufficient will remain to be seen.
It's also unclear as to whether the right to erasure/modification applies to both public and private data. If the blockchain is never shared publically can it contain any user data?
Maybe I should expand this thought experiment as an article.