Great question. Of the 4 computers I actively use, only 1 even has a 3.5" drive. It is an antiquated technology that I, for one, wouldn't mind seeing replaced even in icon form.
Possible replacements:
- a vault icon. Easily recognizable and symbolic of saving.
- a compact disc symbol. More modern but still capable of being outdated soon.
- ???
I'm surprised at most of the responses here. The general consensus seems to be "keep using the floppy since that's what has always been done." Since when has the programmer mentality been to conform to everyone else's ideals? Doing something just because "That's the way it's always been" is no excuse, especially for coders.