Comment by ramchip

You're right about Emacs+Slime being nice for CL, but I don't think Emacs is very good for C++ and Java code. Visual Studio (and similar IDEs) have some killer features: Intellisense/autocompletion that "just works", an extremely good debugger, visual representation of the project structure, plugins for refactoring, integration with Qt and GUI editors...

I'm mainly a C++ programmer, and yet I use Emacs for everything but C++ (IRC client, LaTeX or text editor, Haskell IDE...).