Your Global Store Is a Junk Drawer. Sort State Into Four Boxes First

If everything lives in the store, nothing really lives in the store. I have watched senior engineers, people with a decade on their resume, answer "how do you structure state in a complex app" by describing one giant global store. Server data, form inputs, a sidebar toggle, a cached auth token, all of it swimming in the same tank like it is 2016 and we are still doing it for the aesthetic. It is the fastest way to turn an architecture interview, and your actual codebase, into a junk drawer. Here is the thing nobody says out loud: most of what you call "state" is not yours.