> Unless I missed something in the appeals, the result of Oracle v Google was that APIs are copyrightable, but that an implementation of that API for compatibility purposes is fair use.

The result (so far) of Oracle v. Google is that Googler use was not fair use as a matter of law; that, however, was the result of an interlocutory appeal to the CAFC, and we still have further action at the district court for a judgement, and probably at least one more appeal up the chain, potentially the whole way to the Supreme Court, before we know the final outcome.