> My point is, there are types of messages which are highly time sensitive to the point where the response is meaningless past a certain point

Ah yes, understood. That makes total sense. In fact I was thinking about a practical system that could be used to bypass silent modes and do not disturb configs for such emergencies. Back when MSN was a thing you had a buzz button that would play an alarm, vibrate the chat window and steal the window focus. It was as amusing as it was annoying, but there are practical uses for this.