alt Hacker NewsIf they deleted the blockchain db from the nodes, this is still lost.
Blockchain doesn't have anything esp. to do with data loss. It solves exactly one problem which is distributed double spending in accounting ledgers.
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inigyou • yesterday at 2:50 PM
I suppose the idea could be that you have several different institutions holding the same data, which they know is valid because of the Blockchain.
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A blockchain solves the problem of consensus under Byzantine faults. Payments are an incidental use case, and not even a good one because managing payments including avoiding double spending can be achieved with a weaker primitive than consensus.