Upgrading to OS X Lion (10.7) costs $30. I don’t say that to comment on the “bang for buck” element. It’s more like a coded transmission from Apple: this OS is an experiment, a departure, a transition. When Apple priced Snow Leopard (10.6) at $30 it was because the OS had very few user-facing tweaks — most of the changes were under the hood. But this time it almost feels like Apple is apologizing for the abundance of experience-altering changes: “look, we know this is a lot to swallow, but at least it’s only $30!” Are the new features worth all the hassle? Let’s find out.