Headlights problems of the 2006 Mazda Miata

Hazing of headlight lenses. There is severe degradation of light output over time due to abrasion. This causes decreased visibility and overdriving the lights, particularly at highway speeds, but also during normal driving. I have two 2006 cars, a Mazda Miata and a Toyota rav4, and both began to show abrasion by 20,000 miles. Now my 1963 chevy, with glass headlights, has never had that problem. Two recommendations: 1. Check the price of replacing modern lights. You will understand why when you do recommendation #2 why owners don't replace them . 2. Look at car lights while you're out an about. Observe how bad many lights there are. Unless this only a problem in places like arizona. Now my 1963 chevy, with glass headlights, has never had this problem. They've been broken by debris but that's kind of obvious and a new light is (still) only about $9. Also when they break or burn out the result is immediately noticed. With the abrasion issue lighting is degraded over time and goes unnoticed. Like how shock absorbers wear out a little bit over time and the driver doesn't notice are there statistics where the cause of accidents at night are attributed to "I didn't see him" or "I didn't see her in time"? this could be caused by light output rather than human error. I understand that plastic is safer than glass. I know that there are materials available that are safe and won't abrade . Think aircraft. Lighting should be held to a reasonable mileage warranty and made to last at least as long as the windshield.