sucks to have overheating.
But you know - Sony never informed anyone to this amount of detail before release that their cameras had overheating issues. Did Fuji? the X-T4 overheats as well. I didn't see pitchforks and mass protests about that.
Life did go on, people actually used them for video. People worked around it.
Canon has overheating issues - the world stops.
I get that some are complaining that canon users are saying .. I don't see a problem here when we said there's a problem with sony. But;
the R5 is somewhat of a unique beast that is attempting video. The 4K oversampled is basically shooting at 8K and downsampling to 4k internally. we've never had a camera even come close to attempt that. 6K downsampling yes,. Not to mention, there hasn't been a small mirrorless hit these bitrates before either.
In the end of you are really wanting a video camera - there's better tools. They are surprisingly, actually called, video cameras. They are heat coold, ergonomic hunks of metal made to do the job.
I get there's a small niche that needs a) full frame b) 4k60 full width c) unlimited recording. Perhaps not a stills camera hybrid is the camera for you. at least for now.
What I think the problem is that some thought they could get the equivalent of a $20,000 cinema camera for $4,000 and are now bitter that their dreams didn't come true.
Lost in all this is that canon should be applauded still for pushing the boundaries on what is possible in an ILC. 8 Freaking Kay - is still a thing in for this camera, something quite a few didn't even think possible back in late January. (including me when I first wrote about it).