That's actually a misunderstanding that blew up to an outright lie:
The Start Menu is fully native. The "Recommended" section (and only it) is powered by a React Native backend, but the frame & controls are native XAML. (I.e. there's a JS runtime but no renderer)
The Start Menu is fully native. The "Recommended" section (and only it) is powered by a React Native backend, but the frame & controls are native XAML. (I.e. there's a JS runtime but no renderer)