Well from being a super stock racer for 40yrs a can tell you if you are not rolling when the green flashes you are done. Like Al says most of the pro drivers started in the sportsman ranks, Jason Line ran stock for years, Erica Enders started in a Jr dragster. As far as NHRA changing to qualifying and dial-in is because most sportsman racers can not afford to keep up with the deep pockets of some teams and would be forced to bracket race or park thier cars. This is thier attempt to keep the "little guy" racers competitive in stock/super stock and the creation of the .90 classes. Sorry, rant over😁 Poppaj