Oh yeah, I really like your idea of DCoSL (decentralized curation of simple lists). It's incredible stuff and I think it can/will be a great source of knowledge for us all and also AI (and everyone of course in many ways) in the long term future of Nostr. I definitely see the potential for it.
Some sort of standard or agreement on a given data categorization structure is going to be very interesting for all. i.e "List of my Recipes", "Favorite Recipes", "Vegan Recipes" could be extrapolated to the biggest NIP-like structure of recipes globally. And this for everything.
I'm yet to dive deeper into it, I know there's much more meat to it.
I've been talking with nostr:nprofile1qyw8wumn8ghj76twvfhhstnd093k2mrfw4kjuum0vd5kzmp0qyw8wumn8ghj7un9d3shjtnd093k2mrfw4kjuum0vd5kzmp0qqs9pqy620l0jkgy2yaggr2qs25jk3wdtudeusmdn54e92yuuzglzeqkxh0r2 about this kind of stuff. I'm also a huge Logseq user/supporter and thus I'm really interested in data categorization in general.