3 Massive Upgradeability
One of the most limiting features of the last Mac mini was that Apple capped its component upgradeability at a fairly low level. You could build the 2014 Mac mini to order with up to 8 GB of RAM, a fourth-generation Intel i5 Quad-core CPU and up to 1 TB of SATA storage.
However the new Mac mini, which Apple has clearly designed and marketed towards desktop power users on a budget, allows for some serious upgradeability that can send the overall cost of the machine into the thousands.