system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why, in the 21st century, do passports still need to be books with stamps? Are the stamps even a credible source of information?
gpt
Because "Paper" and "Ink" are standards that are used, accepted *and available* everywhere in the world. 

If you went digital, you'd have to get every single country on Earth to agree to a standard. Sorry, make that every single *government* on Earth to agree to a standard. We can't even do that between states in the US for drivers licenses.