Apple isn't the only vendor using Thunderbolt 3. According to Wikipedia [0], the following vendors have all shipped devices with at least one port: Acer, Asus, Clevo, HP, Dell, Dell Alienware, Lenovo, MSI, Razer, and Sony.

This affects everyone.

[0] https://en.wikipedia.org/wiki/Thunderbolt_(interface)#Thunde...