I'm currently in rainy North Carolina, where Tropical Storm Andrea has me scurrying about my rental car with an umbrella—and getting soaked every time I get in or out of the car. It's not just the rain hitting me when I open/close the umbrella and get my body in/out of the car; it's that often-overlooked design problem of getting the umbrella in/out of the car. With a four-door, you can either open the rear passenger door, throw the umbrella in the back, then hustle into the front seat, exposing yourself to the elements. Or you can climb into the driver's seat, keeping the umbrella open until the very last minute, then collapse it and pull the sopping mess across your lap to throw it into the front passenger seat. We've had umbrellas for thousands of years, and cars for a hundred, and no one has resolved this problem?
Some have tried. Rolls-Royce's Phantom and Ghost models have a fancy, full-size pop-out umbrella that stores in a compartment in the door: