Camlistore seems relevant - it's whole intention is to last (at least) 100 years, primarily by making the data format simple and making data migration (ie, movi

Camlistore seems relevant - it's whole intention is to last (at least) 100 years, primarily by making the data format simple and making data migration (ie, moving between providers, between hard disks, etc) a common thing. https://camlistore.org/ https://camlistore.org/