Time Change Needed?

Is a time change really needed to fall back and spring forward anymore? I kind of got it for farming back in the day. Kids and their parents would be able to adjust to the changing seasons. Change the clock and the family could work more. What about now?  Tractors run on GPS, kids are on their phones and iPads. What really is the point? Arizona stays on the same time, but if Montana does, what does that do to Idaho? Change today as you go to bed so you are not late for church or your latte at a coffee shop.