One will debate what is the "best" sensor size, on one hand, most people post things on the internet, or their computer screen which is in best 8K (2400*3600 pixels)? Thus asking why need for 50-60mpx while they can only see a fraction of it. Then you will say "crop", but again does one need to crop or just get closet to the object and fill the frame with the object, not copping it? Higher mpx means lower dynamic range, much more sensitivity to movements etc. I have a friend with the R6, I have the R5, and to be honest, for most pictures, there is no real difference between our pictures when we post them online. For sports and action photographers, speed of "action" is more important then higher mpx. the R1 is made for those people, not those taking higher mpx shots that needs lesser speed.