Some people on this thread are talking about the java interface keyword in general whereas it seems to me OP is talking specifically about interfaces to backing services [0].
Well that I actually just take that idea as gospel/the basics at this point. In 2022 most applications should be doing things like relying on REDIS_HOST or REDIS_URL as ENV/config and using that to connect. 12factor enshrined these ideas and it's the way to go, I think.
That said, the services that I mentioned where I wanted this pattern actually already do treat their backing services this way, so the idea is more about the general idea of an code-level interface.
Yes, you go further than 12 factors with my favorite point of the article:
> It’s much better to have a DataBackend that has implementations like Postgres14DataBackend and MySQL8DataBackend rather than just changing the driver: 'postgres' to driver: 'mysql' in some configuration file.
That said, the services that I mentioned where I wanted this pattern actually already do treat their backing services this way, so the idea is more about the general idea of an code-level interface.