Sure, there are different acceptable levels of restoration and backup but a 'backup' by definition is just a spare copy of data made in case the original is los

Sure, there are different acceptable levels of restoration and backup but a 'backup' by definition is just a spare copy of data made in case the original is lost or damaged. I was only pointing out that a cloud copy is a backup, albeit a fairly weak one and as you say not useful by itself in every eventuality. It's just absolutist to deride cloud storage as "not a backup" as it can absolutely save data that would otherwise be lost.