[jwells89]

I find that Interface Builder, while not great for editing XIBs on iOS and storyboards on either platform (it's slow and buggy in those cases), is actually still fairly pleasant when working on Mac XIBs. My go-to is pure code UIKit on iOS, but I still reach for XIBs frequently for Mac stuff.

If IB's performance and stability issues could be fixed, I think its biggest problem is the near-unintelligible spaghetti XML that it generates for XIBs and storyboards, which is a huge pain for VCS and frequently cause of merge conflicts (which must be manually corrected). If they just cleaned up the XML output or switched to something more friendly to manual editing that'd help a lot.