I'm happy working on fireproof. The people are very nice. In terms of technology it's a new kind on block. Yes a bit of database and a bit of Blockchain with git rebase.That's why we moving from naming it database to ledger lately.
I didn't say enough about the ledger-like aspects above. Some databases have collections, some have tables, Fireproof has ledgers. These are the unit of sharing and access control, and also the unit of provable history.