Google Play Store starts rolling out new design… violates its own Material Design guidelines

Google has started rolling out a new design for the Play Store… and it goes right against one of the fundamental principles of Material Design.
Namely, it uses nested tabs, a technique that Google explicitly says should not be used and instead recommends using content hierarchy in different forms.
So basically what you get now is a bunch of categories, and underneath another list of tabs, and in some cases even a third list of tabs with this new design of the Google Play Store.
Of …