Yes, I guess my point was, as far as I see it. there is not a huge difference in function BECAUSE the cameras are mirrorless. I do not expect everyone to agree. Just stating my opinion. I don't see that huge difference in function, at least for me BECAUSE the camera is mirrorless. Are DSLRs capable of face, eye subject detection that we are getting now in mirrorless? I admit that I don't know, but I believe the 1DX III already had head and face detection, so would more have been possible? I don't know. While the approx. WYSIWIG functioning of the EVF is, in my experience, one of the the biggest differences, it merely provides more information - it does not change the functioning. The photographer still has to decide whether or not (and how much) to under or over expose, and turn the dial accordingly. Is that enough to put mirrorless is a new category? The new mirrorless cameras have far more focus points that cover far more area. Of course, not all DSLRs had the same amount of focus points or area covered, but do more focus points create a new category of camera any more than more MPs would? Isn't the basic acquisition (phase detect) and display of focus the same or similar enough? If someone walks into a camera store and sees, pick ups, and even uses a 5D IV and then an R5, will they really think it is a whole different type of camera, or will they think that one is just a newer, more advanced version of the other? Same shape, same basic ergonomics, both use interchangeable lenses, both have one shot and continuous focus, and single shot and burst modes, both do stills and video, both have 3:2 aspect ration, both have hot shoes and can use the same accessories. Same or similar exposure modes. Same or similar AF areas. Same type of sensor (CMOS). I'm sure someone will post a list of all the differences, but the question is, how many of those differences are because the camera is mirrorless? I don't know all the answers and freely admit it, but just expressing my opinion that I am not sure why there has been this many-year-long battle and debate about these types of cameras, which in my mind are so similar (and were certainly far more similar a few years ago).