No pro photographers I know feel the need to upgrade from their 5d3s to any of Canon's current offerings. Some do double duty with a medium format camera if they need something beyond the 5d3. Most hybrid shooters I know don't look beyond the A7 line. I still see a lot of the canon Cinema line out at work on wedding and event films, but that is a different category of buyer to those they want to get an EOS R. I'm not seeing much demand for canon mirrorless at all in the real world. This is totally observational though so take with a grain or several of salt.