With all the new and much younger talent coming up through the ranks,
a better class of driver is taking seat in the NASCAR premier series,
Cup, Nationwide, and Truck.  The younger drivers do seem to out
perform seasoned drivers.  It would seem better for N to have a field
of younger age group drivers than a mix of old and young.  

N might consider imposing age limits for drivers just to weed out the
old guys and under performing drivers.  Petty, T. Labonte, Schrader,
M. Martin, etc.. all are examples of drivers who should go away.  

Younger and more risk taking drivers make for a better race.