Is this necessary? We use plenty of symbols the origin of which have since become obsolete and mostly forgotten. Almost everyone is familiar with the meaning of

Is this necessary? We use plenty of symbols the origin of which have since become obsolete and mostly forgotten. Almost everyone is familiar with the meaning of arrows, for example, but not many people are immediately conscious of how it derives its shape from an archery context. The shape has transcended its origins and now simply refers to a context; the same can be true of floppy disks for save (and I'd argue, already is, as I'm sure there are young people now who are aware of what the symbol means but might not be familiar with its originating technology).