bill would be ahead... I know guys who started juicing and made big gains and kept the majority of them or even continued to gain even after quitting for a few of years. They are still bigger and stronger than they would have been had they not.
But even with steroids, you can only get so big. And if you rely on them too soon, you'll never reach your natural genetic limit. It' s unlikely someone would use steroids for years and then stop and make gains naturally.