I love seeing all of these new local-first libraries and tools popping up! I just wish they were around when I started my app several years ago :-(
I use pouchdb / couchdb right now and I think my biggest issue at the moment is the amount of time it takes to sync up the app when you open it. It's possible to load the app straight from local data, but then it might be out of sync which could be jarring / confusing for the user.
Is this named after a triple store (e.g EAV) like in datomic? If so this is looking very close to my dream database.