No, selling also. Upgrading too, but selling a lot.
Not really what I was talking about. With sales, the vast majority of people are going to get what the hardware comes with (I know windows hardware has the option for older OS but the general public isn't going to take advantage of that much). Upgrades are done by the user so it makes a lot more sense that they would only be done if the user likes the newer version better, compared to sales.