What car had the biggest drop-off from concept to production?

My pick is the Hyundai Ioniq 6. The Prophecy concept was absolutely great. It looked like if the Batmobile was a 30s art deco streamliner. Powerful and beautiful. Then in production they just got everything wrong. From the small details, like how the doors cut awkwardly into the roof, to the overall shape (too tall, droopy ass, weirdly narrow greenhouse in the rear).

I know concepts never really make it to production unmolested but... man. Such a disappointment.