I haven't used the R5 but I know someone who has one and it seems like the overheating is overblown for a lot of workflows. If you like the R serries I would definetly at least rent the R5 and give it a try.
Been watching all the tests on the R5 and it's very interesting. Great work. From looking at all the info that's been comming together I think a picture might be starting to emerge.
My theory is that while there is an extemely over-conservative overheating/cooldown timer, there is are some thermal issues that they are trying to control.
I do not think that the overheating shut-off is to protect the proccesor/sensor/RAM/etc but to keep the CFE cards from throttling. This would be supported by the fact that the camera seems to be able to run much hotter in photo mode without shutting down, while in video mode it shuts off at a fairly low temp.
When shooting photos it is not essential to keep the CFE card from throttling as the only thing this will do is make the buffer take longer to clear. However in video mode if the CFE card throttles too much in high bitrate recording modes it could stop recording and potentially corrupt the video file.
So while I think there is some validity to keeping the camera from overheating (and what the R5 is doing seems to make sense), I think that the way they are dealing with it is not good at all. Instead of a timer, they simpy need to monitor the internal temperture and only shut off when it reaches a certain threshold AND let you record again as soon as it falls below that threshold (which seems to be very quickly). I also think that it should not be neccesary to "overheat" to protect from CFE throttling when shooting in lower bitrate modes such as 4K HQ and probably 4K 60 as the throttling would probably not dip below their write speed requirements.
I wonder if shortly before release/announcement Canon discovered an issue with card throttling and slapped on a very ill-designed thermal control system just to keep from having a bunch of "my card throttled and I lost my video" complaints, and may have been planning all along to fix it in a firmware update.
Looking forward to seeing what futher testing reveals.
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