Knowing ECR has pull through caching is really helpful. I'm sure we would have come across that in the course of investigating our response, but this definitely saved us some time!

Edit: Damn, looks like ECR's pull through caching only works for ECR Public and Quay? It's a little unclear, but maybe not a drop in solution for Docker Hub replacement.

https://docs.aws.amazon.com/AmazonECR/latest/userguide/pull-...