This is the reason why the iPod took over in the first place - all the old companies like Sony and so on knew what worked, because it was selling. Changing ever

This is the reason why the iPod took over in the first place - all the old companies like Sony and so on knew what worked, because it was selling. Changing everything was too much of a risk, so they preferred to stay with the safe stuff. Apple had nothing, so whatever it could come up with could change everything. They did, and became successful. But now that they have a product that people like, they can't change EVERYTHING again, because it may not work. So they just keep things the same, and at some point, someone will come up with something that is niftier than the iPod, and capture the market.