Are you sure the physical media is suitable for archival purposes? Many discs degrade over time due to sunlight, oxidation, mechanical damages (scratches etc.) and such. I wouldn't count on them being readable in 5+ years unless the manufacturer has done accelerated aging tests and wants to vouch for their suitability.
It's also doubtful that BDXL readers are going to be available in the future. Physical discs are getting rarer and rarer.
It's also doubtful that BDXL readers are going to be available in the future. Physical discs are getting rarer and rarer.