Nobody asked you to, but if we're going to talk about expectations, then people would be much happier lowering theirs for major OS revisions or changes to any complex system for that matter. Every time a car line gets a new engine, you just know there are going to be issues for the first run that comes off the assembly line. No one was forced to upgrade from 10.6.8 to 10.7.0, or 9.x to 10.0 for that matter, or buy a new computer with it pre-installed. But people do and did because there's a perceived benefit. Early adopters always pay some sort of price though.