Canon would easily recoup their investment. No-brainer. Cost of development - very low. They have already spent the money on developing the sensor and most of the image processing chain, all they need to do is graft that into the existing 5D IV body - which is very nearly as perfect as a camera body can be. I used to spend serious money on cameras, year in and year out. 20D, 400D, another 20D, two 40Ds, 1D III, 50D, 7D, two 5D IIs, 7D II, 1D IV, 5D IV, 5DS R, not mention more lenses than I can remember ... then I tried their awful R series. Never again. How much do Canon get from me now? Nothing at all. And I am far from alone.