Yes, but redundancy also means that resources are never unavailable due overload etc. As hacker news users know, sites with most interesting new content are oft

Yes, but redundancy also means that resources are never unavailable due overload etc. As hacker news users know, sites with most interesting new content are often down. With efficient caching, that simply won't happen. Btw. BitTorrent could utilize caching also much more efficiently. I know RS allows TurtleHopping, which is extremely inefficient method of transferring data, compared to GNUnets solution. With GNUnet you can transfer data directly with the source anonymously, while also at the very same time creating new sources for that data.