AWS actually made an interesting product, a distributed ledger that's 'trustless' as long as you trust Amazon, but with none of the overhead of blockchain so at

AWS actually made an interesting product, a distributed ledger that's 'trustless' as long as you trust Amazon, but with none of the overhead of blockchain so at least it's efficient I think Ethereum is going big places, but the AWS ledger solution is probably also going to be good for smaller industries where competitors don't trust each other, they want a database that's shared, and they all might trust Amazon enough to control it (eg if they're all using AWS anyway) (https://aws.amazon.com/qldb/ https://aws.amazon.com/qldb/)