[elteto]

It is obviously not just that. You just simply don't put together four wheels with motors and a battery pack and call it a car. Forgetting about everything inside (interior design, user interaction, fancy touchscreens, etc) and looking at it from a point of systems integration, it is really hard to design good suspension systems, optimize the aerodynamics and tune the dynamics of the system to have good handling on a broad set of road conditions. Tesla got it right and the big auto makers will eventually get it right too, but by no means is an easy task.