I am striving for very sharp images, und use MF a lot. If I make a small print (18cm x 24cm) for a 100 ASA film, I don't see any difference in most cases. Things start to change in 24cm x 30cm images. It is then hard to get a very sharp image form 35 mm. I don't print 30x40 images form 35 mm, because has to less sharpness and definition. Even document films (Copex) don't give my the quality I want.
I know, sharpness and absence of grain are not the basic ingredients for a good image. And I enjoy others's images even if thy ar not as sharp or grainier in comparision to mine. But for my nature ant architectural images I want the most sharpness I can get with reasonable effort. And that is MF.