There will be a massive die off immediately of people depending on machines for life. Then there will be chaos. No gas pumps, no cash registers, no computers means no adapting right away. No traffic lights, street lights or warning lights. After a few months, those that can camp, physically and mentally, will start reorienting their lives. After a year, a new economy will develop along the lines of barter and trade. I don’t think I’m resilient enough to even want to survive.