After putting it to prod on my homeserver and running some test with a slow remote (a friend homeserver). I was able to have ~30 seconds downtime total across all services for a backup that needed 35 minutes to complete.

Usually an offline backups would have needed to have downtime for the entire 35 minutes to ensure a consistant state. Here i have the same guaranties for much cheaper.

note that the situation I have somewhat extreme but it shows well the benefits.