The example he uses is the OSX Calculator.app which mimics a real-life object almost exactly. By definition then, it is also not as good as a piece of software designed without those limitations.
One benefit of using a Mac is the abundance of high quality software available. There is always new things to play with, and new applications to build into your workflow.
On the other hand this also means you can spend an awful lot of time trying new apps and not enough time actually using them.
My back-up routine currently consists of a Time Machine volume and a weekly back-up of my project folder to Mobile Me. Clearly there is room for improvement so whilst I save up enough cash to drop on a Drobo (for local secure back-up) part of the gap can be filled with the cloud.