While loitering in the local Apple store, I got on a new 5k iMac and started launching a bunch of applications with multiple windows, alt-tabbing and clicking around really fast, etc. Normal dev workflow stuff..

Discovering the glitchy flash in the system preferences pane was really unsettling. Almost a uncanny valley type situation.

I'm still on Mavericks. I've been waiting for bug fixes from Apple and application support for non-Apple apps before upgrading to Yosemite. But after seeing the glitchy-ness on the 5k and reading these comments..

Both recent upgrades are pretty disappointing. When I first got an iPhone 4, I was astonished by how there were practically zero bugs, especially compared to my previous no-name OS, bug-infested phones.

Are there actually more bugs in Yosemite/iOS8? And if so, can we identify potential factors?

Technical challenges shifting to Swift? Regular product life cycle growing pains? Decreased focus on OSs from Apple Increased product-lines/technologies? Pivot from price-skimming to market-capture business strategy?