No one said otherwise

The international organization for standardization has rated them for archival use in the hundreds of years. This is not a maybe and the Wikipedia page/link I shared above goes over the testing methodology

MDiscs are ISO rated for hundreds to thousands of years.

https://www.ecma-international.org/wp-content/uploads/ECMA-379_3rd_edition_june_2010.pdf

Sounds like a Tesla issue