Freenet has been around since 2000, and I remember wondering why Wikipedia was always begging for millions of dollars when there was a way to have users host the content. Sure you don't want to ask someone to install a node just to view wikipedia, but there's enough editors and archivists out there that would be willing to be mirrors if it was just a background process you could run like freenet. It got me interested in programming and I learned that handling conflicts on a decentralized system makes things difficult, plus apparently there's more to running an encyclopedia than hosting servers.
Now wikipedia is mirror'd on IPFS, but its just a mirror, you can't edit. Still the performance of it is surprisingly good.
https://ipfs.io/ipfs/QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1m...