Blockchains are like scrolls: you can write information on them that a society can use to coordinate current actions based on the past. You don't want a scroll

Blockchains are like scrolls: you can write information on them that a society can use to coordinate current actions based on the past. You don't want a scroll for your medical records. You want a journal that can't lose data and can safely give access to any app you want to install without losing privacy. That sounds more like Urbit than a blockchain.