It still is, more or less, because a lot of good stuff is breaking with each new release.
Maybe some of these problems do not occur on Swift or Objective-C, since that's all that Apple uses internally, but using XCode for C++ projects is becoming a pain. Apple is probably too focused on Swift and leaving C++ to roth.
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Code coloring: Generally fucked. If you can Jump to Definition, why can't you color it accordingly?
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Quick help (OPT+click): Generally fucked. Rarely tells me any information about any method, member or class. Even those that are colored (thus identified), do not show any information.