“According to Amazon, Amazon QLDB is ideal for customers who want rather standard blockchain services like smart contracts and anonymous data sharing, but those require a centrally owned ledger. In the press release, Amazon said, “Customers can use relational databases, or they can use the ledger technology in one of the open source blockchain frameworks. Neither solution is optimal.” The primary case the company is making is that even blockchain-based ledgers can be difficult to set up and manage.”