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I also think that simplicity could make the bitcoin use more adoptable by the everyday user who is interested only to know if the payment has been done and not to how many confirmations it had, which input it came from and how many outputs it went to.
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Simplicity will make bitcoin more attractive for not tech-savvy users, it is true. For instance, in order to use the internet, we don't have to know how tcp/ip works, how many protocol layers there are, which protocol one should use to send cat videos. Everything is hidden behind polished user interfaces. Everything in bitcoin should be hidden also with use simple interfaces. But make no mistake, please. Bitcoin is not Visa, it is a decentralized network that requires as many full nodes as possible. Therefore, we shouldn't pander average users to be interested only in sending and recieving. The more people start looking behind the simplicity, the more decentralized network we get. I would like to see more solutions in which simplicity will be making bitcoin both more user-friendly and decentralized.