Electric vehicles are often judged by one key question: Will they really last? A longevity study has suggested that Tesla is making it increasingly difficult for skeptics to argue otherwise. The odds of the brands' vehicles reaching 250,000 miles are reportedly higher than those of several major automakers. What happened? Drawing on records of more than 174 million used vehicles, iSeeCars found that Tesla has a 4.6% likelihood of reaching 250,00…