The air is electric in Fremont, California, where a lucky few gather to witness a momentous moment. Thirty employees rub their hands together in glee, awaiting their prize after months of waiting. Elsewhere around the world, the faithful—the 350,000-odd people who threw down a $1,000 reservation deposit months ago—refresh their email for notifications. Happy Model 3 Day, Tesla fans. Everyone is excited for a reason. The arrival of Tesla’s Model 3 signals a new chapter