iphone 3G had a plastic back and a metal border around the screen, I never managed to break the screen with all the falls onto the pavement. iPhones 8/X have gl

iphone 3G had a plastic back and a metal border around the screen, I never managed to break the screen with all the falls onto the pavement. iPhones 8/X have glass(!) backs. Broken phones sell more phones, making a sturdier phone is therefore counterproductive.