right, but didn't see anything mentioned about backup in the link. or am i missing anything?

An export is one component of a backup solution. :) Scheduling is another (https://firebase.google.com/docs/firestore/solutions/schedul...). (Checking restores is critical, too; that's also feasible [managed import into a new cloud project] but requires a bit more legwork.)

(I work on Cloud Firestore.)

FWIW, I'd love it if you made my app unnecessary. You can consider my site a list of feature requests :)