M-DISC claims a 1000 year lifespan. LG has some consumer writers that support M-DISC I believe. There are Sony BD-XL 128GB discs that claim 50 years of shelf l

M-DISC claims a 1000 year lifespan. LG has some consumer writers that support M-DISC I believe. There are Sony BD-XL 128GB discs that claim 50 years of shelf life - however I'm not sure if they are suitable for archives. However as long as they are regularly tested - they could be decent enough for cold-storage. https://www.reddit.com/r/DataHoarder/comments/ataj1o/upping_the_optical_ante_sonys_128gb_quad_layer/ https://www.reddit.com/r/DataHoarder/comments/ataj1o/upping_...