Ok its not a impossible idea, just requires some sort of joint working group to be setup to set a industry standard.
Given each sensor has a diffrent layout you need some sort of inbetween adapter to adapt any sensor to a basic Standardised Camera Interface. So possibly the Astronomy groups could decide and develop what should be the common Input Output interface and features of the Camera and then manufacturers of sensors just provide an Adapter board to fit there sensor to the body.
So you would perhaps have one adapter board for Kodak sensors of the same size and type, and anohter for a larger format Kodak sensor. Then you would have adapter boards for Sony sensors etc etc. But the basic Camera body would not change and would provide a standard for developers to build adapters boards on top of.
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