I think this point can't be emphasized enough. I read somewhere that Apple wouldn't want to go back to those days when some applications were more important tha

I think this point can't be emphasized enough. I read somewhere that Apple wouldn't want to go back to those days when some applications were more important than their platform, and when they were at the mercy of Adobe or Microsoft to continue providing software for the Mac. If an app becomes bigger than the platform, the platform loses it's strong lock in, and becomes dependent on the application. Like WeChat has become a platform in itself, and in China basically is the de facto platform a phone must support to be usable.