> I think it isn't that we should save all of it, it's that we are not saving any of it. Random letters, notebooks, calendars, family photos, restaurant menus, etc have all proven useful to various historians, of which there will essentially be none from our era.

Well as far as digital letters, photos, menus, etc. are concerned, there's nothing stopping someone with the means and motivation from investing in a doomsday storage facility specifically designed to store these things for posterity. If people can do this for crypto they can do it for digital content.

As for physical items, do you know how much junk Americans have in storage units? The US self-storage industry generates over $40 billion in annual revenue. We're probably keeping more "stuff" in storage units where it has a chance of surviving a zombie apocalypse than at any point in human history.