@jiub It's really silly because Blu-ray as a format was meant to be extendable, and that was part of the reason for most every player and reader having firmware updates (besides AACS bullshit). Theoretically, being able to read/write BD-XL/UHD shouldn't have needed more than a firmware update for existing Blu-ray hardware, though that doesn't necessarily account for the updated protections that UHD discs have.