[mcescalante]

I think instead of meaning specific components (http and routing come to mind) that more often people mean by "batteries included" that Angular has an opinionated way to do most everything, and their docs/guides include examples. In my experience, Vue and React allow a higher degree of freedom in choosing how you would like to approach various things, and there are more choices for some core behaviors for them as well

[onemoresoop]

Freedom isn't bad but in larger environments that freedom can lead to multiple ways of doing the same thing and in turn it becomes harder for new people to jump into current projects, they have to first figure out what the initial thought behind a design was. The way Angular is opinionated benefits this setup and unknown projects look more familiar when you first dive in. Also, searching for solutions online almost always fit your needs.

[daotoad]

Funny thing is, if you look at projects like AngularMaterial, they don't follow to the Angular styleguide by a country mile.

The nice thing is that the automation tools are being made progressively easier to customize. That means that it is easier to define your own standard and support it with standard tooling.