Is decentralization necessarily a desirable trait of such a system? When you throw that in the mix, you sacrifice either security or efficiency. I'd rather ha

Is decentralization necessarily a desirable trait of such a system? When you throw that in the mix, you sacrifice either security or efficiency. I'd rather have a centralized system (single writer) with decentralized mirrors (notaries) that exploit the fact that cryptoraphic ledgers are append-only and totally transparent to solve a lot of engineering problems than a slow, energy-sucking blockchain.