But I can just as easily see them advertising the mini as the ultimate expandable desktop with USB-C -- "adding, and paying for, only what you need when you need it", and just like the rMB which similarly differs from the MB Pro (which also has been losing key ports), "the ultimate in convenient wireless connectivity -- why run wires when virtually everything can be done without them?"
More like "why run wires when the builder has already run the wires when your house was new". Since several years now, modern residential buildings come with ethernet in the walls to every room. The ethernet port is not optional on a desktop computer. I would not want wifi between my desktop and my NAS. As Apple users I think we can all agree that there is a difference in reliability between ethernet and wifi.