Good point, we might want to document that. Btw, I've called it "native backend" and "native forge" myself, but maybe those are not the best terms because there are many possible native backends/forges.
For example, our "Piper" backend at Google is a native backend in the sense that it stores all data in its own database. I think the most exciting thing about that backend is that it's cloud-based so users will be able to access each others' commits (e.g. `jj show <commit id from chat>`) without requiring a push.
