Are kei cars worth buying in the US?

Kei cars (under 660cc engine) are street-legal in most US states for local driving but struggle on highways — top speeds of 60-70 mph with no crash protection to modern standards. They excel as farm vehicles, neighborhood runabouts, and collection pieces. Popular models: Honda Beat, Suzuki Cappuccino, Autozam AZ-1. Insurance is cheap and they fit in any parking spot. Just don't daily-drive one on the interstate.