As a specific example of the downside risks of decisions made in early sobriety, I am familiar with more than a few recovering addicts who formed romantic attachments with others during detox/in-patient treatment. It happens more often than most people might realize despite repeated advice against it.
Those couples I know who then attempted to continue the relationship afterwards did not fare well at all with either the relationship or, more importantly, their successful recovery.
Staying on a straight path early on can be difficult enough without any unnecessary complications.