There was apparently always some kind of mix (AWS did start from internal requirements, though it quickly diverged). The OG services like S3 and DynamoDB power

There was apparently always some kind of mix (AWS did start from internal requirements, though it quickly diverged). The OG services like S3 and DynamoDB power a lot of Amazon for sure. There’s been more bed of Amazon moving to AWS, most recently talk about shifting their main DBs.