Do you really think about floppy disks when you save something? Most people don't. That's what makes it an effective symbol. You don't have to think, decipher, or read. Everyone has learned it and has become more productive by it. Why change that? Would it be wise to modernize traffic symbols as well? If you're going to try to force users to learn something new, there better be something in it for them (I don't see what that would be) and you would need just about every developer to agree upon and use this new symbol (good luck), otherwise you've pretty much asked Christians to change the cross symbol to a new modern torture device.