I think there is a pretty sound case for a tanking economy before 26. There are a few high flyers that are propping up the market but scrape away the foam and it is not looking healthy. The weakness is already showing
we are writing blobs/ objects to zfs tape volumes. it gives us an extra layer of defense from ransom attacks and satisfies our 321 requirement. We make the blobs transparent with some metadata tags. The objects are recorded in the catalog and we can pull individual files out of the blob. deepspace storage manages the tape gateway and catalog for the objects. short answer yes storing send streams to tape is doable robust workflow.
We are using deepspace storage for this. We can get/put objects into the cloud as one of our target volumes. It works as an auto archive writing anything in the fs that is over 90 to a compressed object and leaving behind a stub. You can point Harbor (or other tools like Mimir/Loki ) to a DeepSpace endpoint which looks like a standard S3 target. Then add policies and the files get moved, replicated, versioned to tape, cloud, disk array in the background. The users just interact with the file system as usual and admins have a UI with a catalog which shows where everything actually is.