I laugh at the modern "technical talks" among photographers... I do. It is an insane show: the industry invents more bells and whistles to keep the money coming, and the photo enthusiasts feel their duty to keep up and have the "latest and greatest" in their disposal... What drives this choice? What drives this behavior? - You won't like the answer. That driver is FEAR. The fear of being out-competed by those that do have the "latest and greatest." This fear is based on the lack of confidence in one's creative power. If you subconsciously suspect that your creative power is not sufficient...
Please tell me WHY?! Seriously, why on Earth, with all the technology rally that makes cameras better and even way better every year, with all the bells, whistles and 250-page operation manuals, one cannot make a simple feature that is actually related to Photography? I mean composition-friendly 3:4 aspect ratio in the "sweet spot" segment of full frame "35mm" cameras? Yes, there is a micro 4/3 format that has it. Panasonic GH5 is there, with all the speed and futuristic features... However, who cares? It needs 3 seconds of reviewing the micro 4/3 files to see that the tonality of those...