Floppies were what everyone used to store things at the same time that GUIs were coming into wide adoption, so the first save icons were floppies. And then they

Floppies were what everyone used to store things at the same time that GUIs were coming into wide adoption, so the first save icons were floppies. And then they never updated the icon. Floppies were a thing from like 1970-2000. That's 30 years! No wonder the icon is still around.