Sameer Samat, president of Android ecosystem at Google, asked a TechRadar journalist why they were using an Apple Watch, iPhone, and MacBook:
I asked because we’re going to be combining Chrome OS and Android into a single platform, and I am very interested in how people are using their laptops these days and what they’re getting done.
It’s only proprietary in much the same way as Android. That’s why there are forks like FydeOS.