[Klaus]

Of course, you will always be able to come up with counterexamples because it's not as simple as the formula suggested - there are more factors like sensor generation and, of course, the manufacturer's capabilities.

The Canon EOS R6 is a particularly bad example - as is the EOS RP. Conversely, the A7S III has a higher dynamic range than the R5 for instance - despite 4k binning in the latter.

Just to point to an extreme example - try pulling the shadows in a 20mp smartphone image vs a 20mp full format image. Good luck with that ...

Of course, your mileage may vary but in my very personal opinion, we have reached a point in the megapixel race where other factors are more important than X more megapixels.