>the use case for blockchain can usually be solved with classical, cheaper and simpler solutions by having a central trusted authority for storage (like a third

>the use case for blockchain can usually be solved with classical, cheaper and simpler solutions by having a central trusted authority for storage (like a third-party service provider), and appending using digital signatures. Yes, Amazon QLDB is a good example of that, and is the right solution for most use cases where a central trusted authority is acceptable. https://aws.amazon.com/qldb/ https://aws.amazon.com/qldb/