Alcoholics call it "Getting Sober" for a reason. They don't "Get Drunk"; they are drunk. John Q was barely a drinker at all, so therefore did not "Get Sober." What he did was "Quit Drinking", and there is a big difference.
Dad's recent bout with sobriety was four or five years ago, and lasted over a year. During that time, he was very good to his family. Dad's wellness certainly did not last long though, and within just over a year, he had determined he 'didn't need help anymore' and was back inside the cycle of pills and alcohol. At this point in my life, my father is still an alcoholic and an addict, and he has survived tremendous odds. He is a good man. Addiction is nasty company.