Yeah, I think the actual content of a nostr note is tiny tiny tiny. Like 6-7 lines or something. Although I'll have to figure out how long form text is kept like @YakiHonne , @Habla News does. I'm probably way off 😅

My thinking that alot of nostr is pointing the recipient of the note towards already hosted content like images, videos etc. 

I think a NIP could be made or maybe already exists which encrypts small crucial files but if everyone signed up for a nostr keepass setup I think all the relays would have to take it up a notch in security as well as hdd space and redundancy.. just thinking aloud!