Emacs is a text UI (though it can show images too) on top of a cross OS programming platform where you can create quick UIs for any kind of task you have (interfacing with APIs, command line programs, editing tasks, etc.).
Once you learn how Emacs works and how it can be programmed, you can create interactive tools extremely quickly to make lots of tasks you encounter day to day easier. I do this all the time.
Once you learn how Emacs works and how it can be programmed, you can create interactive tools extremely quickly to make lots of tasks you encounter day to day easier. I do this all the time.