I'd say it's even more than that usually: you're forced to use a paradigm that you're not familiar with. For example, while I do have a desire occasionally to

I'd say it's even more than that usually: you're forced to use a paradigm that you're not familiar with. For example, while I do have a desire occasionally to full-screen a window (for which I currently use Divvy), I usually don't see a need to, because I picked up on the multi-window paradigm where it's quite convenient to be able to see parts of other windows (for drag and drop, for example). When I first switched to OSX though, I hated the inability to full-screen. Not the best example perhaps, as I do find it a bit lacking to not natively be able to do so, but my point is that rage is often a result of trying to cram one paradigm into another.