This is a great analogy
@jrkelly : "In transportation, the subway is an unbeatable way to automate the trip between two fixed points. But if you want to get each rider to a variable location โ their doorstep, for instance โ your best bet is to put each one behind the wheel of a car. Or at least that was true until Waymo came along, Kelly said, and solved the autonomy-variability problem with a car that drives itself."