This concept of different relationship models was explored in Robert Heinlein’s 1966 book “The Moon Is a Harsh Mistress” - except that I don’t remember the term polyamory. I spent a lot of time thinking about marriage after reading it about that time.
For me personally, monogamy has the least potential conflicts, but you must find the right partner. I suspect that many people have problems because they keep doing the same thing over and over.
By the way, Heinlein’s book had a direct impact on my current marriage 35 years later. It eliminated a potential conflict since I had already thought about the problem, instead of blindly following cultural rules and barging ahead.