It's a lack of imagination. People look at established systems that took generations to implement and take for granted all of the developments and revelations t

It's a lack of imagination. People look at established systems that took generations to implement and take for granted all of the developments and revelations that emerged from that generations-long effort to make that system work the way it does today. Then they look at an emerging system, like renewable energy, and see only the flaws and shortcomings, completely forgetting that a historically-massive investment of time and money is the only way to make any new system feasible on that scale.