In 2012, the same Mac mini case held a cooling system for a 45W chip, 2x2.5" storage bays (or one storage bay and a DVD-Drive), 2 RAM slots, and had three more ports and a card reader. They really used every last corner.

The new one is apparently half empty: https://cdn.vox-cdn.com/uploads/chorus_asset/file/22027513/m...