Non-monogamy is not a magic bullet that makes relationships perfect and ever-lasting. I have noticed posts that go, "We tried opening our relationship, and the other relationships ENDED! ZOMG what does it MEAN? What's the point in being poly if people still BREAK UP? Waaahhh!"
So there you have it. Relationships end. Or they don't. It has nothing to do with whether you're poly or mono. It's just that monogamous relationships come with expectations that are sanctioned by society.
That is all. Nothing else.
(By the way, I have been married for 13 years and been on/off again with my other partner since 1988. So I hope that satisfies your request for stories of "endurance". However, I do not "Identify" as poly. My current relationship configuration does meet the criteria for some other people's definitions of poly though, but whatever-whatever. LOts of other relationships have come and gone and come back again and gone again and some have not come back at all during that time.)
Last edited by BoringGuy; 12-26-2012 at 07:37 PM.