Disagree, not inertia. We got rid of other positions with the transition to a new aircraft, but observer duties, and being part of the min crew matrix serves a needed function. I have more than my share of fire/smoke/fumes from components on the aircraft, both on tactical and pilot training flights. Observer is needed to fight the fire/fumes, while the flight station is putting the plane somewhere safe. Too much real estate, components, circuit breakers to cover that we don't have access to if it was just 2 pilots and an FE, that is why we have min crew. That is another set of eyes in the back of the plane (when not reading a book/sleeping/listening to their ipod) that one of those other fire warning systems might not get to.