Here is another good test: Are 24 megapixels enough? I went out for owls yesterday and while I didn't find a Great Grey, we spotted a tiny pygmy owl on top of a tree. This is the original image, at 420 mm (100 - 300 mm lens with 1.4 TC):





Next, massively cropped in with a few exposure adjustments:





Then I ran it through Photo AI, choosing the Upscale option:




The end result is maybe suitable for a 4"x6" print. Perhaps the R5 would have done better, but this ain't bad.