But it's not overfamiliar because the expectations are different. The way Russians and others justify their discomfort with "How are you" is by complaining tha

But it's not overfamiliar because the expectations are different. The way Russians and others justify their discomfort with "How are you" is by complaining that an honest response isn't requested or expected, and giving one is awkward. That is exactly the same situation with "как дела". Though you would only use it with close friends, it is intended as a throwaway comment, not expecting an honest response.