I still need one of these for my other car, that reflector one looks pretty cool.
I am not a huge fan of look through the windshield sensors built into the car, just because they are often very sensitive to windshield damage (crack / pitting), and to windshield replacements. It can make a few hundred dollar windshield replacement from a glass company into a $500+ trip to the dealer. I’m one of those people who looks at every new car from the perspective of how it will still be working when it is a 20 year old car, and most new cars aren’t as good looked at that way. Fancy built in features tend to not pass the time test.
Dashcams are fine with windshield issues, because they just reduce the quality of the image a bit, and you only really need to be able to see what happens in an accident, a perfect image is not key. And while I wouldn’t expect them to last 20 years, they are easy and affordable to replace if you go aftermarket vs installed from the manufacturer.