If your definition of a relationship that works is one in which a couple gets legally married, has babies, and remains together in an emotionally intimate and sexually exclusive relationship until one of them dies, then no, polyamory does not work.

Do poly relationships work out?

Polyamorous relationships work for people who may travel a lot for work, have long-distance marriages, and do not wish to cheat on their partner. Ultimately, being in a polyamorous relationship comes down to the people involved in the relationship.