I think it doesn't work personally. Jealousy and favouritism are extremely likely to occur.
the thing is, relationships are complicated things. a lot of things happen to make them the way they are for some people
sometimes it works out really well for some people, and sometimes it doesn't. something to take into consideration is that polyamorous relationships typically dont just happen like monogamous ones do. its not like you meet two (or more) people you like one day, go on a couple dates over the next few weeks and decide you're all a couple. some people spend months to years just getting comfortable and doing things with each other before actually agreeing to a relationship
im a firm believer in the idea that love has no boundaries. people can make anything work if they approach it right and treat it right