[Analemma_]

That's sort of true, but OTOH vi, Emacs and even Notepad++ can write code and view huge log files. People who are holding out on Atom because of speed maybe don't want two tools where one will do, which is perfectly reasonable.

[Touche]

Large files bring vim to it's knees if you forget to turn off syntax highlighting first. I've done it many times debugging bundled JavaScript before.