I should have written more carefully - I don't expect the _entire_ Internet to be archived by disorganized individuals. 

I expect groups will archive what is important to them, and keep it online as long as they care to. 
Not unlike Nostr relays - you might end up with some central ones that do a lot and everyone relies on. ...and then there is the dark forest of private relays and communities that you don't even know exist but their network is extremely valuable.