I am a total newbie to this (haven't even read much about it) and am wondering what are the advantages of an enlarged negative.

I understand about being able to contact print on AZO and do some dye dodging and masking on the negative etc. but doesn't an enlarged negative lose as much tonality and sharpness/acuteness as an enlarged print? Or does some magic happen that eliminates the normal enlarger effects?

Dmin

Dmin=(barely visible and in a fog)