Well the one benefit that I am definitly getting currently is the love and support from my husband after having my heart broken. You can get support from friends, but this is more intimate (and I don't mean sex), a more personal kind of support, especially if non of your other friends know of your polyness or understand it.
Life is about the journey and not the destination,
so what better way to know life
than to wander all the roads and paths set before you.