You'll notice that it's always bloatiest languages that have the most powerful IDEs. Look at Java/Eclipse. Now back to Ruby/TextMate. Most of the Haskell/Lisp developers I know just use Vi or Notepad.

The problem is, C is a language where = vs == is actually something you have to think about. It's natural that IDEs arise to address this.

XCode is fixing what is really a problem at the language level. So it's the wrong place to fix the problem. At the same time, trying to fix the problem at the programmer level (by forcing programmers to check = vs ==) is equally the wrong place to fix it.

It's a language issue, and that's the place it really should be addressed. But it will never be addressed there, because it would break backwards compatibility since decades.