Good suggestion. I’ve done blue-green professionally with services that are built to have high availability and in cloud environments. If I were to actually setup some form of that, I’d probably use ZFS send/rcv to keep a backup server always 15 minutes behind and ready to go. I wouldn’t deal with file-based backups that take an hour to just walk the dataset to just figure out what’s new. 😅 Probably not happening for now.