I feel like this is one of those "...and the Soviets just took a pencil" type moments. (even though that story of Americans paying millions to develop a space pen story is more nuanced: https://www.scientificamerican.com/article/fact-or-fiction-n...)

But given the number of times during snow season, where my backup camera is completely covered or requires me to clean it. I'd trust the mirrors quite a bit more. That said, I wouldn't mind both.