When thin is too thin

This $169.99 fanless mini PC features the power-sipping Celeron N4000, 4GB of RAM, and 64GB of eMMC storage (M.2 slot available). The system features five USB ports, dual HDMI 2.0, and gigabit Ethernet. Unfortunately, cooling looks nonexistent. The case does not look like a heat sink, and the tiny side vents are extremely concerning. While the idea of a slim PC is compelling, when it comes to passive cooling, the thicker the better.