I know, but i fear for smaller details scratches on outside cameras might still be a issue.
For a reversing camera you just need to be able to see the curb / any kids hiding back there / or that other car, all of which you can do fine with a dinged up lens and or low resolution.
Okay the same are the case filming thru the car glass, i know that my windscreen are pretty scratched up too after 8 years of use.