I don't remember any machine in recent years where we took off or landed with the xfeed open. That includes the 707/720, 727, 737, 757, 767, MD-80, Airbus, Learjets, Citations, etc.
In the KC-135 we had the x-feed manifold pressurized with the valve open for number 2 but all the others were closed.
What airplane are you thinking of?