Many of the icons like Safari and iTunes haven't changed that much, just have progressed with current designs. Take a look at the Mozilla icons, or whatever app

Many of the icons like Safari and iTunes haven't changed that much, just have progressed with current designs. Take a look at the Mozilla icons, or whatever app you're using like Evernote or LibreOffice. Do they remind me of a webbrowser or Office app? Not really. It's just that they are significantly different from other apps. After one or two times use, I remember what it looks like and that's all you need.