They did. And if you have a newer drive it is already supported on your DVD or Blu-Ray. Can be read by all drives but requires a recent firmware to be able to w

They did. And if you have a newer drive it is already supported on your DVD or Blu-Ray. Can be read by all drives but requires a recent firmware to be able to write. An example drive would be Asus BW-16D1X-U. It is supported by the major drive manufacturers but it seem the media is only produced by CNC Magnetics or Mitsubishi Chemical. Sold by brands such as Verbatim or Ritek. It is rated for 100+ years. The variant is called M-Disc: https://en.m.wikipedia.org/wiki/M-DISC https://en.m.wikipedia.org/wiki/M-DISC Discs: https://www.verbatim.com/subcat/optical-media/m-disc/ https://www.verbatim.com/subcat/optical-media/m-disc/ https://www.ridata.com/M-DISC/eng/index.asp https://www.ridata.com/M-DISC/eng/index.asp Blu-ray license list: https://blu-raydisc.info/licensee-list/discmanuid-licenseelist.php# https://blu-raydisc.info/licensee-list/discmanuid-licenseeli... The hard part will actually be to get hardware in 100 years which can read this. So it will not be write and forget. But reasonable shelf life should at least be available.