Benefits of glass roof on tesla 3: 1. Painted metal fades with UV exposure, glass does not. 2. Glass is quick and easy to clean compared to more sensitive painted metal. 3. The acid in bird poo corrodes paint but is no issue for glass. 4. Paint flakes and splits and bulges with metal rusting underneath, again no problem with glass. Consequently, a glass roof for tesla cars will be longer lasting with no loss in aesthetics and more easily maintained. This excites me more than the thought of looking at clouds when your eyes should be on the road. I'm a new member and happy to be part of the tesla 3 club.