Well, they look kind of stupid. They cost too much, They rust, They have very limited range, they basically can't be used for most "Truck things". Yeah, other than the questionable self-driving I don't see much of a reason to have one and the cost is stupid. Oh, I forgot, you have to put them in "carwash mode" or just going for a basic car wash could make the entire thing into a extremely expensive paper-weight.