Smartphone vs Dumbphone and a Lesson in a Bagel Shop

Colleague Walter Riker  looks at the Smart phone-dumb phone conundrum.   I thought this was all solved already, but maybe not. Can everyone master the smart phone?  Just the other day I had a waitress at a bagel shop ask me if I knew how to turn off all the background Apps on my iPhone.  She insisted upon taking my phone from me and showing me how.  And she was very proud of the demonstration.