And one more thing.
The over-all point is that new technology will not necessarily replace old technology, but it will date it. By definition. Eventually, it will replace it. But it's like people who had black-and-white TVs when color came out. They eventually decided whether or not the new technology was worth the investment.
We don't get a chance to do that many things, and every one should be really excellent. Because this is our life. Life is brief, and then you die, you know? So this is what we've chosen to do with our life.
But Apple really beats to a different drummer. I used to say that Apple should be the Sony of this business, but in reality, I think Apple should be the Apple of this business.