[nicce]

What it means in this context? Creation of GUI? Vim is basically IDE at this point, if you configure it well and install plugins.

[thayne]

Note that another non-goal is "Limit third-party applications (such as IDEs!) built with Neovim"

So the idea is Neovim by itself isn't an IDE. But it does enable you to build an IDE using configuration and plugins, or even embedding it in a GUI.