xDB in Azure
One option for all topologies is to move the xDB part of the topology to the Sitecore hosted xDB solution in Azure. This change to all topologies will see the Reporting Service, Processing Service, MongoDB, Reporting database, and indexed xDB content, all removed from the local install. An advantage of using xDB in Azure is that additional training to familiarize people with MongoDB is unnecessary. Another advantage is the environment is built to support scaling out.
For more information about xDB in Azure, see Topology and tiers for Sitecore Managed Cloud.