Previously I read in docs that the C Media Driver is in development and doesn't support Aeron Cluster like the Java Media Driver does.
Is this still the case? Is it a goal for C Media Driver to be on par with Java Media Driver?
Yes, the Aeron C Media Driver does have the features to support Aeron Cluster. It also has the benefit of lower and more predictable latency when configured correctly plus access to extensions to provide transport encryption and reduced latency via ef_vi and DPDK native support.