I came across this YouTube clip earlier this morning about the 2024 version of Exploring Eberron. I found the part about Eberron's Aasimar being connected to Fernia and Mabar to be interesting. Instead of having an angel as one of your character's ancestors, your character has been literally touched by the nature of a particular plane.
I could see this idea being used for anyone wanting their Aasimar character being tied to Arborea, the Beastlands or one of the other Upper Planes. Ditto for the Tieflings and the Lower Planes.