Do not confuse good names with long names. Long names often indicate poor design. For instance, the name MarysDogsBarkLoudness should probably be a DogsBarkLoudness property on a Mary object, or perhaps a BarkLoudness property on the Dog property on the Mary object, and so on.

I would not say that Angular has a built-in state management system based on observables. Observables are a low-level mechanisms for managing stream. There are alternatives for state management in Angular, but they’re not built in.