[bitanarch]

It's been a "premium" feature on gaming PC motherboards - i.e. you need to pay extra for it and it's pretty rare. Laptops have it because Intel's SOCs (e.g. Tiger Lake) have it built-in. But on a PC motherboard they'd need to add a Maple Ridge chip from Intel separately for the support.

[jeffbee]

It's weird that it is premium. Intel should put it and 2.5gbps ethernet in some kind of mandatory part, either on the CPU or in the main chipset. A NUC has these features and a NUC is far from premium. It sucks that you need a weird add-in card that has a lot of flaws to get TB3 on Asus.