ask anyone promoting "blockchain" for any use case other than open, distributed, censorship-resistant sound money, and you'll quickly find that they have no idea what they are talking about
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Hodl on a sec, didn't Satoshi do some pretty critical work on Namecoin?
don't know honestly. if he did, does that somehow make namecoin useful? no.
now that nostr exists, it has helped point out most blockchain projects really just ought to be nostr projects. aside from money, blockchains are useless. but public private key pairs have a gazillion use cases