The fact that this is an argument for anything at all is questionable because it implies you don't use your favorite text editor for any program similar to Unity. When I was using the program I didn't even know it had a text editor because I just alt tabbed to Sublime Text. I would expect many others to do this too because in general I've always just found that the "built in text editor" of any program (whether it be a VPS's control panel or GitHub) is always bad compared to an external one.