Nope! Server does not just send down data. Pubs/subs is how server send data to client. If you don’t have any pubs/subs than you still have autopublish and insecure packages. Those packages are for prototyping, not for production.
When the connection is lost minimongo data remains in memory. If the connection comes back the data should still be there. However, if you’ve reloaded the browser, then you will have cleared memory. Similarly, if you’ve logged out and have user-specific subscriptions, minimongo will be updated and those documents will be removed.
Describes the current reconnection status. The possible values are connected (the connection is up and running), connecting (disconnected and trying to open a new connection), failed (permanently failed to connect; e.g., the client and server support different versions of DDP), waiting (failed to connect and waiting to try to reconnect) and offline (user has disconnected the connection).