I find that on balance, most of those language-specific features are the ones that matter most to me, and provide the best value wrt. my time (and finished product).
Comparatively, the text editing power of vim/emacs, while nice, just doesn't provide that much value to me anymore, *most of the time.
That being said, it varies by language. If I were working in C, I'd probably use emacs. Working in Go, I still do use emacs (the side effect of the language's simplicity is that solid tooling is a snap to integrate in both vim and emacs). Java or scala? Not a chance in hell I'm going to do anything serious with those two in vim/emacs.
