Postgres smaller Read Replicas
Today, when you create a replica for postgres in CloudSQL, it only allows VMs the same size of the master.
It is very expensive this setup, at least for my team. We use the replica for reports that we do not want to impact the load of the master.
I think it is a common case, on AWS it works fine.
It seems to have a validation before doing anything on it. Maybe remove the validation, and show a disclaimer saying "at your own risk". I'm assuming it works behind the scenes.
Or make it possible to create external replicas for postgres.