Thats correct but i think the idea of a glass window is a little sad for sports cars, alittle bit like people putting the windows up so there hair wont be messed up.... The whole idea behind a true sports car is to see the little plastic window. I have seen the new boxster with the glass windows and i dont like them and i aint alone. Ferrari have always kept the idea of the plastic window as it is the true sports car way. There are too many cars with glass windows like toyota and and all other firms that want to offer its convertable. BMW, FERRARI AND PORSCHE always have went for plastic, well besides the new boxster that is ....it would stop the marks caused by converting but my top is always down
so my back window is always looking new
I guess it all depends on the driver, however i can see your point