Thunderbolt 3 is still insanely expensive. The Akitio Thunder2 PCIe Box is $229.00, the Thunder3 Pcie Expansion Box is $299 and if you wanted to do a go-around

Thunderbolt 3 is still insanely expensive. The Akitio Thunder2 PCIe Box is $229.00, the Thunder3 Pcie Expansion Box is $299 and if you wanted to do a go-around by buying a converter, that's also $70 -- the StarTech.com Thunderbolt 3 to Thunderbolt Adapter is $73.99. By economies of scale TB3 ought to be cheaper but it is not. Other docks are even more expensive, the Powercolor Devil Box is $375 and the Razer Core is $399 but only if you buy a Razer laptop otherwise $499. To compare, an M.2 to PCIe DIY solution from a noname company without warranty is roughly $100 so the $229 price is pretty OK. The TB3 box, however, needs to drop to half price and then we are talking. And Thunderbolt of yore was not Apple only by far, HP, Dell, Lenovo all had mobile workstations sporting it. Heck, the Thinkpad T430s had it. Of course, it's all different now, practically all $1000 and over laptops have TB3.