The Xcode installation asks you to close iTunes because of iTuneshelper and how iTunes will sync devices (including development devices) when they're plugged in. It makes sense that Xcode asks you to quit itunes (and kills ituneshelper too) to update files. It isn't ridiculous.
• asks user to perform task manually which is trivial to automate: `tell application iTunes to quit`. Apple even has sudden termination API that iTunes could use to make it safely killable most of the time.
• needs to quit iTunes in the first place. Why can't it take advantage of versioning of libraries and frameworks? Why can't it update files in place? (running application should see old version [inode] until it closes the file).
• and the usual ridicule: a music player is a critical piece of device sync and development infrastructure.
