I only carry one tube and some sticky patches, so I likely would have turned back. Depending on when it gets dark by you, I probably would have just said screw it too, dicking about on the side of the road in the dark trying to fix tires or tubes on subsequent punctures is not my idea of fun even if I have lights.

I've destroyed a tube 1.5 miles into a 12 or so mile ride. I turned around. Also destroyed one halfway through a 30+ mile ride, but as I was already near the furthest point from the car, I didn't really see the point in not continuing, it was only a mile or two shorter to turn back.