Why IDEs

Why do people use IDEs over a good old text editor and a compiler? What does Visual Studio have to offer over Vim and gcc?

IDEs have a lot to offer over just a text editor. I think all programmers should be competent enough to do everything with just a text editor, but IDEs certainly ease the burden of many tasks.
Pre-compilation compilation units enable IDEs to detect errors in syntax and structure before the oblivious programmer would find them in the sometimes cryptic output of the compiler. Refactoring tools allow programmers to quickly and easily refactor objects which is a lot easier than using `find and replace in selection' because the refactoring tools are context specific. The IDE can also give programmers complete outlines of their programs. And the IDE enables the programmer to quickly deploy different compiler settings and debuggers with easy-to-set break points.
Those are some of the reasons why I like IDEs. I think that in most cases they are more efficient productivity-wise. In other cases IDEs are just extraneous.