As you correctly noted, s3cmd/s4cmd have a du command. For my particular use case (paring down s3 storage costs), I needed to traverse my s3 buckets as specifi

As you correctly noted, s3cmd/s4cmd have a du command. For my particular use case (paring down s3 storage costs), I needed to traverse my s3 buckets as specified depths (-d argument, built into above repo). On the outside, it might seem like a small difference. But when you're deep in the use case, it's a great option to have.