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Microsoft develops ultra durable glass plates that can store several TBs of data for 10000 years
(unlocked.microsoft.com)
This is a most excellent place for technology news and articles.
That writing is for words and concept. This is for data. Its a bit more complicated to parse data especially when, according to MSFT, it needs AI to do it.
Your backups are only as good as your ability to access them. Its the same issue with keeping people out of nuclear waste sites.