Agreed. There is no mention of it in the "Important missing stuff", although their Getting Stated page does finish with ADDING BEHAVIOR TO YOUR CHARTS Coming

Agreed. There is no mention of it in the "Important missing stuff", although their Getting Stated page does finish with ADDING BEHAVIOR TO YOUR CHARTS Coming soon... Hopefully that means enabling chart interaction. Of course, by the time they add in the basic functionality which make data visualization useful, they'll have just repro'd ChartJs, HighCharts, or any of those other libraries.