Ditto Bill's comment. I'm not sure when I'll ever use these. Maybe if you go in a car wash? Though with the new laser wash systems, I don't think it would be needed. Maybe a feature better for a true off-road vehicle if you are trying to squeeze between trees or canyon walls? I was thinking if you had a garage with really narrow opening, but then you're probably talking a garage that overall is small and you might never actually get your doors open once in, not to say anything about trying to get out if its really that close.
Truly, I'd love to hear some real-life examples of when you would want this. Just seems like a wasted feature to me at this point.