Why would it be useless for non-Emacs users? It's an integrated tool, just like any other tool which you learn to use. You can use it for this purpose while yo

Why would it be useless for non-Emacs users? It's an integrated tool, just like any other tool which you learn to use. You can use it for this purpose while you use some other editor for other tasks. You don't have to use Emacs for everything just because you use a certain application of it.