But what if a pump dies a 'slow' death, or output starts to quickly drop off, over a few seconds? This could cause a big problem for an engine under boost or N2O, not so much for an NA car. Mad Dart's idea would give an attentive driver a *small* window of opportunity to get off the throttle and maybe limp home. On the flip side, he has 2x as many pumps that might fail.

Not trying to be argumentative, just to understand. (I've had an EFI engine stutter for 2-3 secs due to insufficient fuel, while driving, and it didn't shut off).