My definition of what? I literally said there's nothing wrong with taking that approach. I quite purposely did not argue productivity.

My issue is with the acknowledgment by the author that the standard for "IDE" includes debugging capabilities and then goes on to provide a plugin that provides follow-along only via running GDB, which would need to be configured (I assume, since the author does not specify) the normal ways.

If you want to argue UNIX is the IDE I can get behind that definition, but the debugger is absolutely not integrated into Sublime (or Vim or Atom or N++ or ...) in any meaningful way.