With something like Borg where you can just mount your backups and look at them normally it's fairly easy to see whether they're ok / include what you wanted.

With something like Borg where you can just mount your backups and look at them normally it's fairly easy to see whether they're ok / include what you wanted. Of course, backing a whole platform up is more complex, and things like databases normally require custom scripting (dump -> backup dump, eg. pg_dumpall | borg create ... -).