Outdated metaphors

To start a quote from bash.org.ru:

I was just asked a question: “What is the icon next to the“ save ”button?”
For a long time I tried to understand what they wanted from me.
Finally I understood: here is a generation of people who have never seen a 3.5 "floppy disk ...
When I tried to explain, I came across a wall of misunderstanding:
- why would anyone need 1.4 megabytes, the size of a PDA, if there are flash drives with a nail of 256 meters? .. (already 4 GB. Forgive ignorance))

How terrible to live ... I think to tell about punch cards or not?)

After all, in fact, a generation has grown up, for which the usual metaphors of actions used in icons are no longer metaphors. Will they be replaced by some new metaphors?