The joke about the car brand whose owners were more familiar with social security than social media applies 100 percent to the Buick. GM has managed to get the average age of the Buick owner down to the mid-50s rather than the mid-60s of a few years ago. But the 2014 models showing at the New York Auto Show may not budge the meter much. The Regal has a new “muscle” version but we think GM would be smart to re-badge its German-made Opel Cascada (above) as the Regal convertible. Then they could get the sex appeal of the drop top in the Buick line and also sell “German engineering” too. But then, GM probably does not want our advice.