Well, some of that is anti the way IPFS CID hashing works: every edit would result in a new CID for (e.g. https://en.wikipedia.org/wiki/InterPlanetary_File_System) so your local pin of /ipfs/68106339799a6170efed62807e5c245d becomes orphaned when the next edit makes /ipfs/1ba72a5504f558ade3e784d9d349543c the most recent revision. I'm aware of /ipns but unless there was going to be an /ipns entry for every single page then it doesn't become as much of a distributed filesystem as you might think. Or, I guess put another way: it's really great for a distributed filesystem that doesn't change very often. I would expect archive.org would get more benefit from having IPFS seeds than anything on the Internet that is dynamically generated content
I was actually sad that they don't already generate torrents for all their collections (or at least it didn't appear that they do)