[michaelt]

> (if you prefer you can swap out this cost and replace it with the cost of hiring somebody to do ops for you on an occasional, freelance basis to handle things going wrong, moving to new cloud providers etc. over a 25 year period...).

Plenty of countries have national/legal deposit libraries (my country has six of them) and the costs of running them are a rounding error in national terms. You can hardly claim an electronic national library would cost more to run than a physical library - much smaller volume of stuff to store, no staff to retrieve and shelve documents, no in person visitors.