[Question] What technology, based or not on blockchain, would enable an entity to write relatively large amounts of data in a "sustainable" way -- sustainable meaning, that the data is independent from whoever wrote it (can survive it)?

Writing data to the blockchain solves this problem, but the cost is large and performance is dismal.

Writing hashes to the blockchain at specified intervals, delivers proof of existence, at an acceptable cost and performance, but does not really make sure the data itself will survive its original author.

Is there another way? Can chronicle help?