Just a heads up on an important typo:
"So, if you're shooting at 60 fps, set your shutter speed at 1/120 (or whatever's closest), and if you're shooting at 120 fps, set your shutter speed aaaatttt...1/140 (or whatever's closest). That's right!"
Pretty sure you meant 1/240th for 120fps.
"Yes, you don't get 6K, but so what?" You also don't get 4k with a S35 lens... so you have to either shoot full sensor with Arri's proprietary primes or in essentially a cropped sensor mode for vista vision glass instead of lenses you may have been intending to use.
The camera is an answer to only half the problem, since DPs want to be able to get a 4k+ image on the glass they want to use. Having a new camera that still only gets 3.4k when cropped safely for S35 seems counter-intuitive at their $122,700 with a 1TB mag and $128,900 with a 2TB mag price point.
All the aerial footage for Harry Potter and the Chamber of Secrets was 100% shot with a helicopter. There were no heavy lift drones capable of carrying a film camera in 2002.