">How many years have to elapse before that icon is rethought? When was the last time you personally held an actual floppy disk? How would you even fit a floppy disk into a phone (or website)?"
I don't think any of that matters.
How many smartphones run on AA batteries [1]? How many people have ever configured anything involving gearing [2]?
Rethinking an icon feels like a contradiction. It doesn't matter what it's 'supposed' to be.
It's not a floppy disk, it's the save icon.