The cars were super expensive. At least for most people at 75k+
And then there is this excerpt from an article I found -
Meet the Rally Fighter
The Rally Fighter was first released in 2010 by American company Local Motors. Each is built by hand in the USA, and somewhat unusually, customers are required to go into the factory to help build their own car alongside the engineers, technicians, and mechanics who work there.
https://silodrome.com/rally-fighter/
Who will pay huge money for a vehicle and then actually have to go into the factory to help build it themselves? Anyone could see this failing miles away.