There's others reasons why you want as much heat dissipation as possible, as wide as possible in a high end camera, however. Many cameras are limited in their 2

There's others reasons why you want as much heat dissipation as possible, as wide as possible in a high end camera, however. Many cameras are limited in their 2160p30 and 2160p60 video recording times by heat build up. Also now 6k and 8k capable cameras. The cooler your cfexpress card can run, the less cumulative watt hours built up in the camera body during a "long" 20-30 minute recording session. Some that are designed with a focus on video recording have active cooling and fans for the cpu and sensor, such as the new Panasonic gh6, or a red Komodo.