I'm not convinced. There are various different estimates for how large the internet is with varying confidence, but most I found average around a few hundred ze

I'm not convinced. There are various different estimates for how large the internet is with varying confidence, but most I found average around a few hundred zettabytes. The Internet Archive seems to be in the ballpark of a hundred petabytes. So unless I got it wrong, the archive currently covers about 0.01% of the whole thing. How much we need to cover the useful bits is a separate discussion of course.