A question to the more scientifically competent than I:
So, DSLRs have bigger lenses than rangefinders or other mirrorless cameras because there is a bigger distance between the end of the lens' flange and the sensor. Would it be possible for Canon or Nikon to make a mirrorless medium format camera that could use their existing stock of 35mm equivalent DSLR lenses?
They could but it wouldn't be worth it. 35mm lenses wouldn't have an image circle big enough to cover a MF sensor.