Without being brought back up to operational condition they are boat anchors.
You would not supply a forty year old Cessna in such a state, irrespective of what uninformed talking heads say, there is no way in this planet such a complex asset could have been provided in such a way.
This discussion shows a clear split down the line of those who understand ( or at least comprehend the need for) support systems and those who don't.
This is not a poorly scripted scify movie where a plucky hero with no training, no experience, jumps in an ancient, dust covered, plane, tank, ship, spaceship, that just works, and saves the day.
This is the real world. If it is not properly supported, and personnel are trained, even if it gets off the ground it will be useless, then it will likely crash and people will likely die.