EMR with GP3 EBS storage and M6i Instance Types

The way AWS works is by gathering data on customers' needs and prioritizing the development of the most needed and requested features. Just asking "when..." without providing the background to the request regarding your workload and scale needs is not going to work. EMR is the service that is supporting the largest number of versions both of application and instance types compared to any other AWS service. Maintaining that many configurations and testing that everything works for every possible combination is a big challenge. You need to sell your need to prioritize its release.