> since that puts me on the hook for assuring physical safety and backups of my backups
Only in the event that Google locks you out, at which point you can create a new backup elsewhere. If Google has a copy and you have a physical copy, then Google would have to lock you out at the very same moment your house burns down for you to lose any data.
Only in the event that Google locks you out, at which point you can create a new backup elsewhere. If Google has a copy and you have a physical copy, then Google would have to lock you out at the very same moment your house burns down for you to lose any data.