This sort of issue is actually fairly common with BD compatibility updates. What’s not common is to see it get released to the public that way. Samsung does it again.
DRM on BD movie discs is voluntary, and many studios don’t use it. The updates are needed so that the occasional disc that does use it will be playable. The BDA puts the new encryption keys out there and people can use them or not. So there may not be any discs that will suffer from a failed update, certainly no more than a few.