I was doing a renn faire (and going to the hotel jacuzzi afterparties) back in the late ‘90s, and reading '70s SF before that, it’s nothing novel to me. The problem with polyamory is polyamorists. I remember setting up my OKCupid profile and saying I’d consider it and it took another hundred questions before my matches were remotely acceptable again. Maybe if it ever caught on among the sane and attractive.