That’s a lot of work creating a whole system that stores data on a raw block device. It would be nice to see this compared to… a filesystem. XFS, ZFS and btrfs are pretty popular.
Similar systems include Facebook's Haystack and its open source equivalent, SeaweedFS.
Interesting project but lack of S3 protocol compatibility and fact it seems to YOLO your data means it's not acceptable for many.
And means it is acceptable for many others. There is a whole world outside of s3 you know.