For the record, I meant key combos that don't use modifiers unnecessarily, similar to GMails, where for example, just pressing “u” goes to your inbox. Modifier keys aren't necessary with modal interfaces.

Of course, at that point, basing your modifier keys on VIM just makes sense :).

Restrictive in scope? Enable the mouse, press i and as long as you don't press escape it will be the simplest text editor you could want.

You're right! Why complicate things by saving?