If you put a smartphone circuit board into a car it won't make it 5 years until failure from sheer mechanic stress. There is a reason you can buy automotive grade components, and it's not that car makers like to pay more or have less volume.
And ultimately, of course, circuit board weight or dimensions are not really a metric worth optimizing for something that goes in a car. If you can make it cheaper by only having 6 layers instead of 18 for a smaller version, auto makers will choose the penny pinching option every time.
And ultimately, of course, circuit board weight or dimensions are not really a metric worth optimizing for something that goes in a car. If you can make it cheaper by only having 6 layers instead of 18 for a smaller version, auto makers will choose the penny pinching option every time.