Actually, the internet archive is achieving exactly this goal unintentionally for economic reasons—they’re uploading data onto Filecoin because it is so deeply subsidized by the block reward, which has the indirect effect of checkpointing the data in a cryptographically robust way. https://archive.devcon.org/archive/watch/6/universal-access-to-all-knowledge-decentralization-experiments-at-the-internet-archive
Actually, the internet archive is achieving exactly this goal unintentionally for economic reasons—they’re uploading data onto Filecoin because it is so deeply subsidized by the block reward, which has the indirect effect of checkpointing the data in a cryptographically robust way. https://archive.devcon.org/archive/watch/6/universal-access-to-all-knowledge-decentralization-experiments-at-the-internet-archive