Need separation for backup data
"What we would really like to see is this product instantiated as a software app integrated with macOS or Windows and making its data part of the host's file:folder system so that apps there can work on the data as locally stored content."
Um, no, not if it is being used for backup. Too easy for ransomware to get to your backup data as well as the primary copy on the host machine. You need some level of separation between primary and backup data for the backup to be safe.