I think its really clear now why Canon choose to not even try to mitigate heat on the R5. I originally thought it was to protect sales of the pending R1, but if they had started developing a cine-version of the R5, that effectively is the same thing. All things said, the R5 is still an excellent camera, however, other makers will not go this route. Sony and Nikon will catch up and make their variants capable out of the gate, leaving the R5c to die after the single generation like the 1Dx cine-version. Yes, I know Sony does have cine versions of the A7S, but when they make a R5 competitor, it will not be handicapped to protect another in its line.