Over the last four years I've gotten pretty good at developing iOS and, more recently, Mac apps but I'm not going to invest any more time in a platform subject

Over the last four years I've gotten pretty good at developing iOS and, more recently, Mac apps but I'm not going to invest any more time in a platform subject to this kind of arbitrary and dictatorial control. I'm shifting back to Rails and the open web. It's a much nicer developer ecosystem and potential client pool. And it's even a better business environment for all but the biggest players. In hindsight I regret investing so much time in Apple's walled garden.