Comment by tremon

This registry was centralized

Not to detract from the rest of your message, but it wasn't centralized; the data was collected and stored in each municipality separately. The only part that is centralized is the historical archive: after death, each person's info card is moved to the National Archives.

This system has never been centralized, even after digitization: birth records are still kept only in the town of birth, and when moving house your active records must be officially requested and the transfer manually authorized between municipal systems.