Hah, is this a troll? It’s a lot older than those editors.

EMACS started as Eugene Ciccareli’ init file for the TECO editor (which was also a programming language) around 1976. Hence the name (Eugene‘s Macros). It was later rewritten in Lisp for Multics, the MIT Lisp Machine (I worked on one for the Xerox lisp machine as well), and later Unix (in those cases using lisp only as an extension language)

> Isn’t eMacs just a text editor like vim or nano?

For a start it's either spelled "Emacs" or "EMACS", and definitely not "eMacs".

Then it's closer to an OS than an editor.

...or notepad