A lot of the questions I get about dataflows in Power BI boil down to the simplest question: “Why dataflows?”
On Saturday November 7 I joined MVP Reid Havens for a YouTube live stream where we looked at this question and a bunch of other awesome dataflow questions from the 60+ folks who joined us.
The stream recording is now available for on-demand viewing. You should check it out!
 And therefore most difficult to answer concisely. That’s just how it goes.