Did you forget I work on health care? Sharing encrypted files, dynamically adding and removing permissions to them is where I spent most of my career. Blossom is fine. Can we do better? Sure. But at what cost? I am not convinced there is any need to make things a lot more complicated just for the sake of sharing permissions to access files. The more complicated these systems get, the worse it is for security and privacy of that data. And usually vendors that are pitching complicated systems are either centralizing things on themselves or finding shady ways to get access to some of the data to sell later (by logging the transport layer, for instance). Yes, a LOT of functionality can be added to these types of things. But I have not seen anyone actually asking for them on Nostr yet. Which means it might just be middle management bloatware.