> "may eventually" That suggests a "Drake Equation" type estimate, probably something similar to: density = current_disk_density * moores_law * official_e

> "may eventually" That suggests a "Drake Equation" type estimate, probably something similar to: density = current_disk_density * moores_law * official_estimate_of_project_lifetime total = building_area * density * "round up for reporters/management" * propaganda multiplier round_up_to_next_si_prefix(total) The actual value is probably somewhere between "current (much smaller) need" and "how much do we need expand the budget", both of which are far smaller than those numbers.