I have a friend who just bought a new car. I asked him if he would have bought that car if the manufacturer decided what kind of child safety seat he could purchase only through their store, or what kind of seat covers he could buy, again only through their store.
I have to admit and so does he that the car is great, has many features, is on the cutting edge so to speak when it comes to that particular product. All great reasons to buy that brand.
But if people are barred from expressing their personalities and also enhancing the functionality of the things they own through third party help or not then it tends to bring out the rebel so to speak in people.
I have jail broken my iPad precisely because I do not like being forced or told what I can or cannot do with the things that I spend my money on.
I love Apple products because they put so much effort into all aspects of those products. I just think they are a little too controlling outside of their own house!