It'll need to be numerical otherwise no one will know what you're talking about. Someone mentioned it might go the same way as iOS, but I don't support that idea. I reckon the Air will be its own line with the Air 2 being released next year alongside a new foldable device.
I get what you’re saying, but we have this with iPad’s, Apple TV’s, and MacBooks. While there’s ancillary information further identifying them. It’s pretty much just the model name.