The dispatch model is also relatively easily copyable, though. I don't want to downplay the amount of tech work that went it, but it's not an insurmountable obs

The dispatch model is also relatively easily copyable, though. I don't want to downplay the amount of tech work that went it, but it's not an insurmountable obstacle -- taxi companies could sign up with a service like Curb or Easy, or even create their own like Yellow Cab Houston's Hail a Cab.