The linked article also explains: > DVDs are more resistant to rot > DVDs and CDs use aluminum layers for the reflective 'data encoded' layer > Discs using a g

The linked article also explains: > DVDs are more resistant to rot > DVDs and CDs use aluminum layers for the reflective 'data encoded' layer > Discs using a gold layer are extremely resistant to corrosion and thus disc rot > Blu-ray discs use a silver-alloy for their reflective layer. Though not linked, or stated, it is quite likely that the BR discs are significantly less likely to be damaged due to disc rot for similar reasons as gold-layered discs are, though not necessarily as resistant as gold. Disc rot though appears to stem due to the damage of the lacquer or plastic layer on discs, which if the disc then remains undamaged, it should not be as susceptible to rot.