I disagree. There are already many text editors that do everything each other do, but they all do it differently, some in GUI some in command line, some with different shortcuts, etc. You could argue that Eclipse does almost everything and has a very high level of extensibility and yet you won't get me or many people I know to use it for most tasks. It's not just about some checklist of possible actions it can do. It's about workflow, ease of use, integration with the larger jobs. It's more similar to the "standards" argument than you give it credit for. Other wise everyone would use emacs or eclipse.