As a devotion-pilled non-monogamous girlie, my experience is that polyamory actually facilitates long lasting relationships in ways monogamy doesn’t—for instance, your partner falling for another person is always possible, but only in monogamy does it signal a necessary end.
I think a lot of my opinions/feelings on polyamory and ENM changed by simply seeing people be more willing to collaborate and actually work on their relationships.
That said, I'm still a little unsure if I possess the necessary skills to handle the ups and downs of polyamory.
This isn’t to say monogamy is wrong or that polyamory is better or whatever, just that the idea polyamory is inherently more anti-commitment than monogamy doesn’t actually play out lots of the time 🤷♀️