It's all about platforms. In most of the world, the OS is the platform; it determines which apps are available and what the UI looks like. In China, apparently

It's all about platforms. In most of the world, the OS is the platform; it determines which apps are available and what the UI looks like. In China, apparently WeChat is the platform and the OS becomes irrelevant. The closest analogy for the rest of the world is the web browser. Chromebooks are only possible because enough functionality is available through the browser without any direct access to the OS whatsoever.