I don't think a long term, major content archival project is a good idea for a blockchain. Since the internet is so large, you would have to have major, major s

I don't think a long term, major content archival project is a good idea for a blockchain. Since the internet is so large, you would have to have major, major sharding (as opposed to the naive approach in bitcoin where all nodes contain the entire history). And additionally if you archive everything in an immutable datastore, you are going to end up archiving and then hosting illegal content, and afaik it is still not settled whether that constitutes a crime (in my opinion, it should).