Currently On-Demand views can be created with a 'by device' option type. However this option currently disregards actual defined group-membership and winds up totaling all items per device.
i.e. A group might contain specific Interface-member subset, for say SaaS/SFDC/AWS like tunnels. A separate group for select components such as CBQoS class-1-and-2 classmaps [leaving out default/scavenger...].
Trending volume or other metrics per device within the CAPC's views minimizes how often multiple items and charts need to be csv-exported for additional analysis, eg to compare against each device's WAN/MAN volumes.