It matters depending on what your needs are.


If you want to produce higher quality museum or gallery prints at of certain dimensions: lower pixel counts will make that impossible.


If you want to publish in certain books: lower pixel counts will make that impossible (art books require different resolutions than magazines and newspapers require even less).


If I want to publish a huge print for a fashion ad: megapixels is a must. You end up without details and with pixellated images if you dont have enough image data to print at that size.








There is no right or wrong answer: it depends on you, your needs, and what your clients (if you have them) or gallery wants from you. So the one thing to do is ask YOURSELF what you need and what people need from your photography and then act accordingly.