I agree that OS X is great and that people should upgrade, but I won't be upgrading to 10.2 any time soon and I'm not happy about it.
Four months ago I spent $120 on 10.1. That was a lot of money for me, but I was more than happy to do it. However, I cannot afford to spend another $130 to upgrade to 10.2 after such a short time. I would gladly upgrade if they offered a reasonable price, but as it is I just can't. Not for another 6 months at least.
If I had known that 10.2 would be out so soon after buying 10.2 and that it would cost me another $130 dollars I would still be using OS 9 and waiting for 10.2. I should not have to spend so much money to upgrade my OS more than once a year. And since I can't afford to, I won't.