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These disks were designed to self-destruct in the presence of oxygen. They literally rust away.
Oxygen and its O2 form does like to sneak into everything. Even sealed in the original packaging, there’s a limited shelf life. Flexplay claimed stability of only one year, which isn’t much given it comes sealed in a plastic bag.
When cars are the only way to get to a bar or a friend’s place, then you’re going to get drunk drivers. Car dependency has a big hand in causing these deaths.