Well. There's no Supreme Court ruling on the copyrightability. The Federal Circuit did hold that APIs are copyrightable, and as far as I understand the Supreme

Well. There's no Supreme Court ruling on the copyrightability. The Federal Circuit did hold that APIs are copyrightable, and as far as I understand the Supreme Court carefully avoided deciding whether or not they were right about that. So it's not great, as it does leave the Federal Circuit finding that the APIs were copyrightable standing so far, but as you say it could have been worse - it does not have remotely the same weight.