Also the following is ridiculous: "It's also obvious why it makes no sense to ask "Why don't you ditch Windows and install Linux on it?". Because no Linux distro has Pen support, whatsoever. The performance base also has a physical key that you need to press in order for the hinge to release the display."
Wacom has been developing Kernel modules FOR YEARS. I've personally been using a Samsung XE700T1C for 4 years with full pen support without any problem.
I've even been surprised to see Ubuntu 17.10 supporting automated screen rotation, on-screen keyboard pop-up out of the box.