No one survives a KC-135 crash on take off, most are over 50 years old.
Those a/c have been upgraded to the latest instrumentation and the engines are the most powerful yet to be on a KC-135. It doesn't matter so much as to how old the airframe is if the maintenance is up to date but it does matter that sometimes bad things happen beyond anyone's ability to handle. The laws of physics, gravity and probability are always in force. As one with more than 20,000 hours in big Boeings I can tell you that complacency and inattention to reality is a sure recipe for trouble.
There was one that crashed at Loring AFB ME in late 60’s or early 70’s on take off and all the crew walked away from it.
Lost power as I remember and could not get off crashed right off end of runway