> Also seconding. Vanilla emacs is already extremely powerful, and if you're doing real work, you'll end up having to use hosts that don't have all of your wonderful enhancements installed. It's good to know vanilla emacs.
I wonder if I'm weird, but I use a highly customized Emacs on my dev machine, but if I have to ssh into a host and edit something I just use vi there. The correct answer to vi or emacs has always been "both" for me.