https://android-developers.googleblog.com/2023/08/latest-art... has a lot more details.
They talk about how they modularized. That's about it. Kind of not really worth reading. Seems more like a, "yay we managed to modularize some things" self congratulation, rather than getting something useful to the community.
Also the article does indeed describe some examples of what was optimized.
You mean marketing party?