Dont get me wrong. It is a phenomenal release. I don’t care so much about the 8K thermals as I had a feeling it was going to be heat limited in some form. But I didn’t expect such limited performance in 4K as well.
A crazy idea, but I wonder if Canon could have somehow created an R5 body with a heat pipe and an optional battery grip with an integrated fan that can somehow transfer the heat away. Then the video shooter like myself could get extended shooting performance and the stills shooter could get the regular traditional grip all without compromising the weather sealing of the body.
I think it's reasonable to assume 8K will be included in future cameras, and they will work on heat management one way or another. Perhaps the next generation of cinema cameras will do it better.