I wish Canon had MF.
There will never be a Canon medium format sensor under the price of their cheapest full frame 35mm, i.e. you would NEVER see a Canon MF body for less than a 6dm2, and likely not less than a 5dm4. I would guess that a 6d-equivalent medium-format would cost at least $1500 more than a 5dm4. Of course, these are all just wild guesses, what the hell do I know? My tastes are not mainstream, case in point below:
I like the idea of modular systems, like you have several body frames to choose from, and you build your camera from there, based on budgets and your needs. For example, you could build a fixed medium format compact into a 35mm full frame skeleton, or a interchangeable lens/leaf shutter/full frame/with no viewfinder, just a large waist level touchscreen. This could be done on some level, although mixing ff with mf may not work. I would like to see more options though. Or maybe a still camera built just for a still shooter, something with a massive buffer, but no video, and all the video electronics filled instead with goodies that make the still shooting mo' better. (Because if I want to do video, I go buy a video camera. WTH is wrong with people wanting a camera to do both?). I guess I am just crazy, but I like the idea of a custom camera, just like a custom PC. You buy the sensor, and you choose a 100mp full frame, with on-chip adc, BSI, Canon has it all, or go cheap and stick with the crap sensors they currently build, whatever. I get it, some people hate dynamic range, and that is why they made 6d. Some people hate ISO, so they made 5DSr. Anyway, getting back to the modular idea, next you add a hybrid VF that snaps into that body, and to save money, you choose not to add the video processors so you can maximize the buffer of still shooting. Then, instead of adding a standard battery box, you add a modular double battery to the bottom.
Also, why are all cameras in a native 3:2 ratio? This is idiotic. A lens is circular. At the very least, the sensor should be a square that you can crop, OR the sensor should be a circle that you crop, thereby using the maximum best sharpest parts of the glass in the lens. That long rectangle has always been a stupid design IMO, and I often tend to buy cameras that do cool stuff like let me shoot a square through the viewfinder without having to use Live View to do it. (The 5DSr and I think the 7dm2 lets you shoot a square image of about 32mp, and it crops through the viewfinder. Damn Canon for not putting this in every camera, especially 5dm4 and 6dm2.)
I think Canon will eventually get it all sorted and be the top dog, but it is going to take time. I am still pretty sour that I feel my dozen or so L lenses are obsolete. I stopped buying all Canon stuff when the R came out, just on a holding pattern right now.