They're also going with the concept that resources aren' finite. Between the quest for "the most amazing pixel perfect UX/UI" one didn't have time to properly

They're also going with the concept that resources aren' finite. Between the quest for "the most amazing pixel perfect UX/UI" one didn't have time to properly dispatch NSKeyedarchivers in a queue with groups and synchronise on the main to update the UI or deal with large Core Data writes on a private queue, so now the app is gorgeous but slow as shit until one get some more time. The problem with most designers who camp in Photoshop is that they become oblivious to implementation details that matters once you run the damn thing. UI/UX as previously stated, is very subjective although there is always objectivity to performance. But hey, at least we got that amazing custom menu bar that is totally better than the other menu bar that wasn't exactly the same. Those who've worked in body shops will know this. Take a look at the new Twitter client. Obviously it has some nice style to it. But it's slow, buggy, and crashes. Factor in that resources are finite and design can be good enough, but performance can't be good enough.