Readership ???

[gunhilltrain]

It's a robust platform. I wouldn't be surprised if some airframes see a hundred years. You don't upgrade engines and avionics unless you expect the airframe to go the distance, which they obviously do.

I might as well look it up. The Air Force might go for another twenty-five years with some. There are 72 of them around now out of the original 744 built. Some war planes only last for ten or fifteen years total because they are replaced with newer models.