This question is bit vague . in what way would you think anyone would feel " unsure as to where they stand " ?.
The only differance i could imagine is the question of parental rights , however this issue has seen many changes in law of late.
Other than that i do not see any question as to where " one stands " being relative ..
If the relationship breaks down, then if one or both partners are no longer willing to work on the relationship then it should be deamed over and void. " cold it may sound, but practical"