Why GNU Emacs?
Apparently, I'm feeling ranty today...I've used Vi and Emacs as my primary editor. Now I've moved on to Sublime Text 3. Despite being powerful tools Vi and Emacs have probably harmed the state of Unix text editing. They've kept antiquated UIs from before keyboards were an text editing UIs were standardized. It's kinda sad that MS Dos, Windows and MacOS have all had a plethora of powerful editors with convenient standard user interface meanwhile the Unix world is anchored to Vi and Emacs. It seems like they've managed to starve out a good chunk of innovation on this front.