I see a lot of opinion here, and not a lot of hard evidence. Maybe the changes in OS X, and the move away from skeuomorphism in particular, have hurt its usabil

I see a lot of opinion here, and not a lot of hard evidence. Maybe the changes in OS X, and the move away from skeuomorphism in particular, have hurt its usability, but the way to prove that isn't through emotional op-eds. Get a group of non-Mac users, randomly split them into two groups. Set them a number of basic tasks: writing and sending an email, editing a photo, opening a particular website, etc. Then have one group do it on an older version of OS X, and the other on a new version. Then record how long it takes them, what things they struggle with, etc. Ask them to report their level of frustration and enjoyment. It wouldn't be a perfect experiment, but it would at least produce some concrete data to discuss.