We know that Facebook uses React, React Native in production for both Instagram and FB. But I have not read about any google sites using Angular.
I'm wondering whether it has anything to do with the rewrite of Angular 2 totally different from Angular 1.
Here are some examples:
Google
https://whichphone.withgoogle.com/
https://www.google.com/retail/#?modal_active=none
https://www.google.com/partners/
https://www.google.com/about/careers/applications/#/
https://www.google.com/edu/
https://www.google.com/express/
Apple
https://developer.apple.com/search/?q=wwdc&type=Videos
You can find a lot more here:
https://www.madewithangular.com