Rather than just making baseless assertions about people who favor vim or emacs, please mention an IDE with the same maturity, community, cross-platform support, cross-language support, and customizability as either vim or emacs.
To pick just one random alternative, let's take gedit. It looks simple and standard, which is nice. It's newer, that could be OK. It can be installed on more than one platform (though not necessarily simply). It has the major features, it's basically feature-complete. For fancier stuff and language-specific tools, you can write plugins with Python, which makes all kinds of things possible. On the other hand, it can get crashy when you use a few plugins - maturity issue. There are few plugins and fewer actively maintained because there's not a big community to support and build on it. A lot of its behavior is reasonable but not really customizable. Random example - if I personally want to have a simpler interface in the vein of scribes or WriteRoom, I'm SOL. Of course, gedit simply cannot be used from a terminal, so you will use another editor for that, with its own keybindings etc.
Most of the good editors have a story like this. Even if it seems to work great and be flexible enough, the community and plugins aren't there.
If your goal is only (say) to write C# for Windows, Visual Studio is probably best. If you only want to write Java, (say) IDEA is probably best. These are powerful environments. But only for certain things, and in a certain way. If you want to code on another platform, different language, really change the behavior, get around a bug, or get a fancy new capability without paying a vendor lots of money, you are just going to hit limits and have to pick up yet another tool.
If you've learned vim or emacs then you at least have a default which licks all these issues at once. In this sense they are "ultimate editors". And this is an opinion informed by broad usage of many editors.