Re: AWS Postgres Aurora....
It depends how you choose to look at it. AWS are doing to Oracle what Oracle did to IBM and DEC many years ago - providing a more affordable product that meets their customers needs.
Is there any lock-in? In theory there's nothing stopping you moving to a different database if you can convince your in-house development team or external software vendor to support it ;) And while I'm making people laugh, I've just broken two of my Queen records. Oh, how I want to break three
In terms of who is better, IBM << Oracle << AWS << ??? The only constant in IT is change.