600k seems a bit too much. That's a fairly large city.
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joined 1 year ago
Blockchains have the property of being append-only, so a blockchain is precisely what makes it impossible to delete transactions. That being said, in a distributed system, once the message leaves trusted servers, it is obviously also impossible to delete it.
Over 700 years. A tower originally built in 1310. The island it's on is an exclave that is technically part of Hamburg.