I'll point out another reason why you might not want more megapixels - size and data management. If you're shooting your photos RAW and you take a lot of them,

I'll point out another reason why you might not want more megapixels - size and data management. If you're shooting your photos RAW and you take a lot of them, you'll easily have a photo library whose size is in the hundreds of GBs, if not in the TBs range. Hard drives are cheap, but in all likelihood your photos are precious to you - meaning you have to back the library up on a regular basis. A glut of meaningless megapixels makes it harder to preserve the meaningful data buried within.