Which is more complicated, the optical system of photography VS the automobile industry?

Personally, I think the two systems are not comparable. As far as electronic technology is concerned, the automobile industry is definitely wider and more complicated than the camera cover technology. In terms of sensor technology, there must be at least 80 sensors on an ordinary car, which is more and more complicated than cameras. There are almost no optical instruments in the car, and even if there are, they are not standard (customized or homemade by enthusiasts), so the optical system without photography is incomparable to the automobile industry.

As for your supplementary question, I don't think cars can be copied. Many technologies are exclusive. Just think about F 1. Last time, the job-hopping of one of Ferrari's top engineers had a great impact, so Ferrari also went to court with its opponents and filed a lawsuit in the FIA. These technologies you mentioned basically belong to electronic technology, and there are various means to realize electronic technology. For example, anti-shake can be achieved in many ways, such as micro-displacement or micro-gyro. Microgyros and micro-displacement devices can also be subdivided into different technical means, different materials and different designs, and these differences can be registered as practical patents.

In a word, photography and automobile industry can't be compared with each other in terms of technical coverage and cutting-edge degree. But as far as optics is concerned, it can only be said that these are two different fields.