I guess it's all a matter of preference, I guess. Some people think it's blasphemous to modify a camera to do something beyond what the original designers intended. Some people think it's a bigger sin to let a perfectly capable equipment sit & rot on a shelf, even if 'rot' meant keeping it pristine and polished.
Some people consider a fraction of the 4x5 film not being utilized is a 'waste'. Some people, like me, consider putting a roll film back (even 6x9) behind a lens with a larger coverage is a waste of the image circle