I may be wrong but it seems to me that immutable blob (git) are a perfect match for any blob storage such as s3, gcs or azure blob storage. I even think there a

I may be wrong but it seems to me that immutable blob (git) are a perfect match for any blob storage such as s3, gcs or azure blob storage. I even think there are some libgit2 backends which do exactly this. It may then become a problem of latency per blob, in which case you could coalesce blobs into bigger ones as needed (histories don't change much) and optimize for that.