An update on multilane traffic roundabouts. 12.3 does marvelously in even heavy traffic when exiting the roundabout's 1st exit (right turn equivalent) and 2nd exit (straight equivalent) because it stays in the outer lane. However, when exiting the 3rd exit (left turn equivalent) it becomes a blubbering mess. Before entering the roundabout, it first signals a left turn, then it swerves into the inner lane where it stays until it tries to exit. Then it puts on its right turn signal and cuts off all the traffic in the outer lanes. Admittedly, multilane roundabouts are a dumb design and further, most US drivers don't understand them. With regard to roundabouts, FSD seems to rely on Catch 22. If everyone else drives poorly in a roundabout, I'd be a fool to do otherwise.