Because Apple implemented an USB 4 controller. Asmedia, due to covid, didn't finish in time for AMD this time around. It was scheduled for late 2020. https://ww

Because Apple implemented an USB 4 controller. Asmedia, due to covid, didn't finish in time for AMD this time around. It was scheduled for late 2020. https://www.guru3d.com/news-story/asmedia-600-chipset-family-for-zen-3-available-in-late-2020.html https://www.guru3d.com/news-story/asmedia-600-chipset-family...