Oh, true, debugging affordances as well. You can also use a debugger from the command line, though—the IDE is wrapping terminal commands, or at least wrapping a library and providing functionality equivalent to that library's terminal client.

I never got in the habit of terminal debugging, but I'm sure some people prefer it over using a GUI. I'm that way for git: The command line interface is unintuitive, but I've gotten accustomed enough to it that it feels comfortable.