Earlier quoted context omitted.
As per your citation, ARPAnet came online in 1969 and emails were being exchanged by 1972, barely 3 years later. Blockchains have been around for 10 years now and every year they cause bigger problems without actually solving any.
> Blockchains have been around for 10 years now and every year they cause bigger problems without actually solving any. Being able to transfer value between two parties without having to trust anyone has value. We can argue about how much value, but it's non-zero.
There is a lot of trust involved in a cryptocurrency transfer. You have to trust your technical competence to securely mount your wallet. You have to trust the wallet you're sending money to is the wallet it's supposed to go to. You have to trust the person you're sending money todo what you're paying them to. You have to trust the network to maintain the value and convertibility of the currency you're sending and receiving. Et cetera, et cetera
In practice, nobody wants to do these things. So we see centralization at exchanges. Precisely in the way people not wanting to handle cash use banks.