alt Hacker News10PB is probably the amount of data a medium sized country can collect about its all citizens (basic details, work history, all taxes, all financial records, all medical records, all police records, all biometric records and more) for their lifetime.
I think development like this might get many public sector focused firms sweating.
Those records are going to be pretty negligible in terms of storage. It is only a couple new records per day. Even if you add things like detailed mobile and tracking telemetry, it is a few MB per person per day.