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The old one didn't seem as good because when I wrote it I was relatively new in the crypto space and kind of made a distinction between blockchains and cryptocurrencies, while now, I believe at least public blockchains are what they are because they have the financial incentives as crypto. Otherwise, they would be just some very inefficient databases, where likely none of their qualities would be guaranteed since block producers would not be incentivized to be honest or to keep the network honest, and users would have no incentive to use them.