Ability to select a single region for Google Container Registry
Currently only multi-region buckets are supported. This results in extra egress costs, especially from Australia. Other major cloud providers (Azure, AWS) offer single-region container registries. This is especially bad in Australia where egress to other regions is $0.15US per GB.
Laurence Parry commented
Agreed, I had no idea that it would start using multi-region storage (not free) for something that was deployed to a free App Engine instance specifically in us-east1. Moreover it seems to have kept containers for the old versions around even after I deleted them. There's binary files in us.artifacts.PROJECT_NAME.appspot.com - I can't tell if they can be safely deleted or not - maybe they're for auto-redeploy? Or does it use the container?