For men it's the threat of losing a job, and for women it's being married and living with a spouse; surprisingly, men and women seem to have dramatically different motivations for successfully completing an aftercare program.
Sober living housing reduces stress, offers sanctuary from temptation and improves sober social skills; and most importantly, sober living housing improves the likelihood of long term abstinence and a happy life free from substance abuse. The period right after the successful completion of a rehab stay is one of the biggest risk periods for relapse, and to minimize the risks and stress of a transition out of rehab, a lot of people very sensibly consider moving out of a residential rehab into a sober living housing environment.