Thinking about it further, this is true of OS X too. Even though it made toolbars more ubiquitous, it was still unusual for "standard" actions to be placed there.
I would think that a longtime Mac user probably associates "save" with the key shortcut ⌘-S more strongly than any kind of icon.
GP's point is quite interesting because there is a generation or two that hasn't seen a real floppy disk beside on those icons. they probably have no clue what it is.
i wonder what other icon images are like that.
Oracle used to have logos for some products that looked like that (or, come to think of it, like a stack of button-cell batteries):
https://www.google.com/imgres?imgurl=https%3A%2F%2Fvtcholdin...
And I've always wondered if they based their HQ building on those logos, or if it was the other way around:
https://www.google.com/imgres?imgurl=https%3A%2F%2Flive.stat...
Also, Apple famously used the OP's bomb icon whenever Mac OS plunged forward into a crash.