[raverbashing]

> That reason is either incompetence or market segmentation.

Yes

Or simply because most people don't record longer videos. Or because that heat has to go somewhere and a bigger heatsink might heat some areas (or the user).

Or the current heatsink is an existing part and it was "good enough"

[sudosysgen]

The average person isn't recording 8K RAW videos and doesn't have a computer capable of handling that either. And the EOS R5 at 3900$ is unarguably a professional camera.

It's almost 100% using unique parts, too.