I haven't heard what came of the SFO law suit. Last I heard UA legal took over for SkyWest in dealing with it.
You're right, a piece of concrete can only handle a finite number of ops and the FAA may eventually rule about that. Sooner than that, the laws of profit and loss will rule on it. It's much like getting us to drive more fuel efficient cars. When it hits the bottom line to the degree that driving a hybrid makes sense, then we will drive a hybrid. The airlines will eventually react and change things around, but only when the bottom line is hurting enough. It hasn't reached that point yet.