I swung from USAirways Chairman's Preferred, American Platinum, Marriott Platinum, and Hertz President's Circle down to nothing.. till I got letters extending my status a year from all of them.
But the I still stopped flying and now am driving, now I got Marriott Platinum, Starwood Platinum AND probably Hilton Platinum but no airline status.
Swing left, swing right, who knows where you'll end up...