Not sure about "all encompassing" but this pretty much describes the relationship I've had with my wife for the last 30 years. She is my best and my only close friend, we spend 90%+ of our time together and we both would have it no other way. It doesn't have to end.

> That’s because those two groups study relationships more than non-poly people do, so they have a broader perspective.

To nitpick, polyamorous people tend to study relationships through the lens of (shocker) polyamory. Not all such studies apply broadly, and I've not had great experience with polyamorists being able to distinguish.

> Classic new relationship energy. It’s such a wonderful feeling. On top of the world. Everything in life glows. But NRE runs out.

The word for this is "infatuation", and it is well-studied.

You don’t have to be poly to bring “relationship anarchy” to your current relationships.