What makes the Intel NUC 9 Ghost Canyon's I/O special for a mini PC?

The Intel NUC 9 Ghost Canyon is rare because it packs dual Thunderbolt 3 ports on the rear panel — workstation-level I/O in a tiny box. It also has two separate Gigabit Ethernet ports with Intel controllers (i210 and i219), making it interesting for a router or firewall build. Dual Thunderbolt 3 adds external GPU or NVMe enclosure support, punching well above its size class.