(current Googler)

For what it's worth we still use Android Studio as well internally, it is better and faster for doing specific UI stuff because of the tooling and visualization.

On the flip side the Google monorepo is a pretty cool thing and you get used to switching between projects and languages within the same commit chain pretty often. This is part of the reason the cloud IDE is so popular because it's one common editor across many languages compared to language specialized IDEs like Android Studio.

Regarding networking, it's not a big issue day to day. The infra team does a really great job building tools that do efficient caching and integrate well over the network.