I've been using Emacs for almost 15 years now. At some point I even did my emails (using mu4e) and social medias (twitter and identica at the time) with it, in addition to all my work. My Emacs was heavily customized and I spent a lot of time fine tuning it to my likes and needs.

About two years ago, I switched to KDE (from nothing except the Openbox window manager). I wanted to give Kate a try. It's a very decent editor but it was really hard for me coming from my all powerful Emacs setup. It did not really last, but it made me realize that I was originally using Emacs because it is free software from the GNU project, but it was still a jail to me as I was at a point where I had a hard time being efficient anywhere else, even in a vanilla Emacs without all my setup.

Since then I'm still using Emacs but almost vanilla (only minor adjustments — my .emacs.d/init.el dropped from several hundreds of lines to a couple dozens) and not exclusively Emacs. Even for text editing I sometimes use Kwrite or Kate.