IBM Cloud lets you upgrade major versions through Read Replicas and also do dry runs, https://cloud.ibm.com/docs/databases-for-postgresql?topic=databases-for-po

IBM Cloud lets you upgrade major versions through Read Replicas and also do dry runs, https://cloud.ibm.com/docs/databases-for-postgresql?topic=databases-for-postgresql-upgrading#upgrading-from-a-read-only-replica https://cloud.ibm.com/docs/databases-for-postgresql?topic=da...