Personally, I think that people would stick with Canon is they started recording a full readout of the sensor/ no line skipping, gave us 120fps, gave us C-Log, more scopes, and dramatically improved the low light.
I don't think that's going to happen, of course. Canon's video features feel more like courtesy add-ons than real "features." They're great for the family that wants a good stills camera that can also shoot some video, but we all need to accept the fact that Canon is not making these cameras (<$4000) for this crowd.
"I love Canon's color!" If color is the only thing holding you back from leaving Canon, buy some color grading courses.
Is it possible that a lot of older, more experienced cinematographers choose the Arri because that's what they started with many years ago? I feel like it's similar to how we have Canon vs. Nikon people; people tend to stick with the camera brand that they first learned on. Just a thought.
It's amazing that Sony can put out such an amazing camera at this price, and people still complain and call it garbage. The only complaint we should have with this camera is that the record button hasn't changed!!!
I'm a Canon 6D owner. It's a great camera, especially now that it's only $1400 on Amazon. Yes, it has aliasing issues. Buy the anti-aliasing filter from Mosaic Engineering ($365). The 7D also has pretty bad aliasing too, btw.
The GH4 is a great camera too. Much smaller sensor, requires different lenses to fit that sensor.
A lot of people say that Canon also has the best color science, but that's a matter of opinion.
Personally, I've switched to the Sony A7s. Obviously much more expensive than these other cameras. BUT, you should look at the Sony RX10 II. For $1300, you get a 4k capable camera with a 24-200mm f2.8 lens. This would be a phenomenal 1st camera to use for films.
Videography work & story aside: I'm seeing a lot of digital artifacts, and the picture looks a bit mushy. I know that camera produces some nice sharp images; I'm wondering if you compressed it too much before uploading? Looking at the download link, it says 127mb for 1080p. My last wedding highlight of the same time length was 461mb.
I'm not a fan of gear obsession either, and I agree that you should push your current gear to the max before upgrading; learning how to get the best results with what you currently have is invaluable.
But I find it weird that he has "no interest in upgrading to a better camera." It would be different if he said, "I have no interest in upgrading to a better camera YET."
Cinematography is our art-form, and our tools should not inhibit what we want to create. The Canon DSLR's can produce lovely images, unless you're trying to capture a wide landscape shot with lots of grass & tree detail.
Moire & aliasing isn't just distracting, it's changing your picture without your approval. A painter would not choose paints that change color on them once they dry. Why would we want a camera that changes the image we're capturing?
All those other things like actors, script, lighting, music etc. are obviously much more important than your camera choice. BUT, you'll eventually come to the point where your camera is your weakest link.