This is something I have been thinking about lately. Will the blockchain data be preserved forever, or is it likely that at some point, there will be a hard fork that will allow some of the old data to be discarded?
As far as I know, the idea of a blockchain is inherently based on the preservation of all the blocks to ensure the integrity of the new blocks and the blockchain as a whole. But I don’t think it will be impossible to discard some of the data in the future.
Another aspect of this question, especially in relation to the steem blockchain, is the fate of the images that are not actually saved in the blockchain. I don’t know for sure, but I guess that Steemit uses a technology like IPFS for storing the images (correct me if I am wrong). Anyway, are the images saved in a centralized system, or do they use a decentralized platform? Is it possible that some images may become inaccessible in the future?