If the floppy disk was no longer the save symbol for software, and I had to chose one, I’d chose the floppy disk symbol.
But you worded your question wisely to avoid that loophole, so I’m not sure what to use instead for an otherwise unique and ubiquitous symbol, already known as “the save file icon” for two generations that have not seen it.
While we’re at it, let’s also replace the phone icons with a rectangle, as to not confuse anyone.
If the floppy disk was no longer the save symbol for software, and I had to chose one, I’d chose the floppy disk symbol.
But you worded your question wisely to avoid that loophole, so I’m not sure what to use instead for an otherwise unique and ubiquitous symbol, already known as “the save file icon” for two generations that have not seen it.
While we’re at it, let’s also replace the phone icons with a rectangle, as to not confuse anyone.
Just change one pixel and call it new.