I know Vim well enough to use it for this kind of thing but, IMO, if you find yourself doing a lot of hot edits on live servers you're doing it wrong.
Almost all of the editing I do is in a consistent environment on my development machine and I don't see the point of using a lowest-common-denominator tool when I don't have to. I'm sure with some work you can bend Vim into something approaching the power of an IDE but why would you bother? Text editing is a pretty small part of the work of development, after all.
Text editing is certainly a small part of development, but if you're in a dev role where your job involves writing a lot of code, you actually are spending a lot of time in editing mode. I spend quite a lot of time in Vim now because I'm doing a lot of programming, and that's why it's worth spending the time to both learn Vim and configure it to taste. Most of the time what I need to get the job done is a great text editor, and Vim scratches that itch. If, for instance, I was doing massive code refactoring instead I can see why an IDE would be the right tool to use.
Almost all of the editing I do is in a consistent environment on my development machine and I don't see the point of using a lowest-common-denominator tool when I don't have to. I'm sure with some work you can bend Vim into something approaching the power of an IDE but why would you bother? Text editing is a pretty small part of the work of development, after all.