One simple use among many, those without a COTS OMS, and manage outages manually, when a new outage point or area is created, can use GEE to alert medical baseline customers in the affected areas, or just citizens who may sign up for call outs.
We use it for vehicle locations, meter events and restoration status events. In storms, it gets overwhelmed with events - meter events can reach 400 transactions per second. We're currently running the 10.2 version and not sure when we'll move to the latest version - no budget. I'm curious about the latest version where now it supports clustering and high availability.
