I probably draw the line around 600-800 mbps, which would be 4.5 to 6GB per minute.
I prefer BRAW whenever possible - better than ProRes RAW - and of course it's internal on my BMPCC 6K Pro and BMPCC 4K. I generally shoot Q5 on both, which can average around 5-7GB/min on the 6K and about 2GB/min on the 4K. If I'm doing something that needs green screen work or anything like that, I might shoot Q1 on the 6K, which is a whopping 11-12GB/min or Q0 on the 4K which is about 8GB/min. But that's better than ProRes 422 HQ which is 7GB/min on the 4K.
I reviewed the GH6 recently and while ProRes is a great feature to have, it takes up a ton of space, especially if you shoot the open gate 5.8K. Much prefer to just shoot 200mbps H.265 LongGOP (in 5.7K DCI or 5.8K open gate), which is a lot nicer than ProRes 422 HQ which clocks in at 1522mbps (both 23.98p). For 4K DCI I would use the 400mbps All-I H.264 4.2.2 - I wish Panasonic had at least offered H.265 All-I 4.2.2 for the 5.7K DCI and 5.8K open gate, instead of just 4.2.2 All-I ProRes. Supposedly they did this since H.265 is heavy on computers, but my Mac Studio can easily handle it - even my Mac Mini M1 doesn't have a problem with it.
For me, I use BRAW whenever possible. It's the best compressed RAW codec out there outside of REDCODE RAW. Smooth as butter to edit and of course seamless integration with Resolve. CinemaDNG provides little benefit for me and produces massive files that are simply unwieldy to deal with.
ProRes is more of the a convenience thing than an actual efficient codec. It just works smoothly on a lot of computers without top of the line specs, but once you get beyond 1080 HD, it becomes simply too much storage.
I edit off a few SSDs in RAID 5 configuration, then I have some regular HDDs in a NAS for archival storage.
Hopefully more compressed RAW options open up in the near future once RED loses their patent in this Nikon suit - at least that's what I predict will happen. It will also be hilarious to me if Nikon, the company that has historically never cared about video or filmmaking, is the one to invalidate their stupid patent.
(keep in mind, everything I shoot is narrative film, so high-quality video is necessary - so I'm willing to tolerate higher bitrates, though not excessively so)