This really is a shame. I’ve checked all the other “premium” windows laptops and none of them have the solid looks of the SB2. Sigh. I may just have to buy it as it is then. It’s either that or another MacBook Pro that dual boots to Windows.The simplest answer -- and this is part of what's so frustrating about the SB2 -- is that I haven't yet come across a notebook since buying the SB2 that has NOT supported HDCP 2.2 via its USB-C (if they supported display) or Thunderbolt 3 ports. I can remember one (an inexpensive one, can't remember which) that did not support it out of its HDMI port (which was HDMI 1.4, I believe). Most notebooks with HDMI ports today seem to have HDMI 2.0.
tl;dr: I've reviewed quite a few notebooks since December 2017, and since I've been checking for HDCP 2.2 support, only a couple did not support it. But every single premium ($1,000+) notebook I've reviewed other than a Surface Book 2 has supported Netflix at 4K on external displays.
I assume I can at least watch 4K YouTube on an external monitor though?