You're right but not all media are the same. Arctic Vault used an optical film with QR codes. You can theoretically even take its photo and decode it by hand if

You're right but not all media are the same. Arctic Vault used an optical film with QR codes. You can theoretically even take its photo and decode it by hand if you want. They even added a Rosetta Stone to the entrance so, even if all the knowledge is lost, one can hypothetically decode the data stored there. For magnetic media, you need some more specialized equipment for sure.