Dozens of new electric-vehicle models are expected to arrive at dealerships in the next few years. We followed eight Wall Street Journal reporters in four countries to see if they, and the world, are ready to make the switch. Electric vehicles have long posed a chicken-or-egg conundrum for auto executives. Buyers too often find them to be pricey, ugly, limited on range or unavailable. Car companies won’t invest because we aren’t interested in buying. We aren’t interested because there’s little to choose from. So, thirsty SUVs and pickups, powered by cheap gasoline, keep driving the U.S. car market. Yet,…