Xcode 6 (the latest version) has a really good set of features but there's a huge number of crash bugs all through the app (and supporting tools like Instruments). Depending on what you're doing, you can get stuck in constant crash loops.
Fortunately, Xcode keeps perpetual auto-backups; otherwise you'd lose your changes multiple times per day.
Fortunately, Xcode keeps perpetual auto-backups; otherwise you'd lose your changes multiple times per day.