This is only feasible for applications where latency is not a concern. The overhead of just the HTTP call to an s3 bucket (not to mention all the other bucket a

This is only feasible for applications where latency is not a concern. The overhead of just the HTTP call to an s3 bucket (not to mention all the other bucket access overhead) is much higher than the overhead of a disk read request. Try performing 1000 random file accesses to a bucket, and 1000 random accesses to a disk. The performance won’t even be close.