What a weird dig. It's neither expected, nor established that he can't see a solution. I'm not as smart as Andreessen and I could come up with half a dozen solutions.
Author's favourite is fine but far, far from obvious. How viable is it to run your own federated wiki anyway? Are there packages for popular systems? Are there plugins for major browsers? Is there any federation actually happening? I skimmed the resources[1] and don't know. Does anyone here run one? That would be a solution, this seems more like an idea.
And it's not like no one's doing anything. There are services like Pocket or Readability to store an article until you want to read it, Evernotes, Google Keeps... Our very own 'idlewords will archive the contents of your bookmarks for a fee[2]. Finally, there's archive.org.
[1] https://github.com/WardCunningham/Smallest-Federated-Wiki#ho...