Someone correct me if I'm wrong as I never tried it, but I've heard with a presta valve you can blow air into the tire with your mouth. I guess that can be good in a pinch to get you back to the car if you don't have a pump.
As for schrader valves being pretty much the standard in pumps, just leave a schrader valve adapter screwed onto the presta. That way you don't have to worry about it.
As for schrader valves being pretty much the standard in pumps, just leave a schrader valve adapter screwed onto the presta. That way you don't have to worry about it.
