I may be a photography journalist and longtime Sony A7 III shooter

A photography journalist, experienced with Sony Alpha cameras, is seeking advice on choosing their next camera. The decision is between the Sony A7R IV and the A7 IV, with a primary motivation for upgrading being the desire to incorporate videography into their work. While the A7 IV is marketed as a hybrid camera with features like a vari-angle screen beneficial for video, the journalist is hesitant to give up the A7R IV's high-resolution 61MP sensor, especially since their prices are comparable. Concerns include how the higher megapixel count of the A7R IV might impact video quality due to downsampling and sensor readout speed, as well as potential hardware strain and overheating during video recording.