I agree that modern polyamory, specifically within the working class, is in some ways a consequence of neoliberal capitalism colliding with sexual liberation.

As rents and cost of living increases, the need for more roommates to cover rent increases steadily, and why not choose roommates that want to fuck?

3-4 people living in the same apartment/house and sharing fewer beds while actually enjoying being around one another is a fantastic way to cope with the hell of late stage capitalism and the housing insecurity that comes with it.

This is actually how polyandry started in rural Tibet so there's historical president for labor units becoming sexual units that share the burden of cost of living/labor of social reproduction.