Ubuntu should not be the bar. Maybe Windows - but Windows has a significantly more difficult task. Apple controls all of the hardware & software. I would expect

Ubuntu should not be the bar. Maybe Windows - but Windows has a significantly more difficult task. Apple controls all of the hardware & software. I would expect significantly fewer bugs than the other platforms. This is also not just about Yosemite. The fact that the iOS update rates are significantly lower this year is a sign users were not happy with the previous update.