alt Hacker NewsOver here, it is DB2, SQL Server or Oracle if using a plain RDMS, or whatever DB abstraction layer is provided on top of a SaaS product, where we get to query with some kind of ORM abstraction preventing raw SQL, or GraphQL, without knowing the implementation details.
This sounds like a flashback to J2EE. Which I know is still alive and well. Banks, insurance companies and the tax agency do not much care for fancy new stuff, but that it works.