It's just the matter of personal preference I guess... I have good enough completion for terminal with my current ZSH configuration. (I am not fan of auto completion even in IDEs and editors) One thing I need from few tools that I use everyday (terminal and text editor) is as low latency as possible, I get really irritated by all those few ms of lag that are visible after keypress, I don't know why. So any Electron app is no go for me from the start, so I decided to stick with Vim and Emacs. Only GUI editor that blew me away by it's performance is Sublime.