They often do it. One that causes great annoyance to me is that when a calendar alarm goes off, you no longer have the ability to pause it to an arbitrary perio

They often do it. One that causes great annoyance to me is that when a calendar alarm goes off, you no longer have the ability to pause it to an arbitrary period before the event. Why it was removed, I have no idea. Yes, they kill entire apps as well - usually the professional ones like Aperture. At this point I would say that it would be folly to let a business depend on any Apple software.