To me, polyamory is in the same category as cuckolding in the sense that it's none of my business...but I think it's weird fetish.
I don't feel like it's possible to love multiple people simultaneously and equally. Anecdotally I know two people who have been in poly relationships and they were messy, both ending with one monogamous couple and the remaining person getting cast out.
I know that doesn't describe every poly relationship.. that's just my own secondhand experience and I haven't seen anything to offset it.
But....it's not my life so I wasn't gonna stop them. I just wouldn't recommend anyone try it