I agree with the logic of your comment, and to the extent that you're writing advice to Shirt Pocket and to other developers, I have no dispute.
> In this case, all I have to go off [...]
Well if you're looking for evidence that SuperDuper is good (and if you accept appeals to authority from internet strangers), SuperDuper is part of John Siracusa's backup strategy: https://atp.fm/703 John Siracusa reviewed macOS for ten years for Ars Technica (these _reviews_ are magisterial), and is an authority on the Mac.
> In this case, all I have to go off [...]
Well if you're looking for evidence that SuperDuper is good (and if you accept appeals to authority from internet strangers), SuperDuper is part of John Siracusa's backup strategy: https://atp.fm/703 John Siracusa reviewed macOS for ten years for Ars Technica (these _reviews_ are magisterial), and is an authority on the Mac.