That's a good point, Brant. Definitely the mirrorless cameras should be simpler and easier to build, and should also be inherently more durable. I don't think that the focus system of a DSLR could ever match the potential of a mirrorless, given the difference in the way they work. The mirrorless camera has the incredible advantage of being able to use the primary sensor to get focus and exposure. The system on the 1DX III is pretty phenomenal, but the potential for mirrorless is so much more. Some things with mirrorless still have a ways to go, such as spool-up time after the camera has been idle. But I think the mirrorless version of the next 1DX will be quite a powerhouse.