Why consider data redundancy the use case at all? If you really care about a file you could always back it up on multiple local drives and email it to those who

Why consider data redundancy the use case at all? If you really care about a file you could always back it up on multiple local drives and email it to those who want it - that's not what Web3 or crypto is about. Its about the storage of valuable data i.e. data whose integrity holds a lot of value: Public keys, account balances, etc. I'm interested in culling the superfluous aspects of crypto, heaven knows they exist, so if you want to be involved in helping with that you should first become more competent on the subject.