For now, the Xreveal Decryption Key Database remains the most effective, community-driven solution for backing up physical media. As long as a single software player (like PowerDVD) or a single hardware player’s keys are leaked, the database will continue to grow.
The million-dollar question: Who populates the Xreveal Decryption Key Database?
: The Pro version can often obtain keys automatically via an internet connection, bypassing the need for a manual KEYDB.cfg file.