IDE specifically, or editor in general? The former wouldn't really surprise me since most of the editors I see friends and coworkers using aren't really IDEs per se; I mostly see people using VS Code, Vim, Sublime, and maybe emacs occasionally. The only IDEs people I know ever talk about using besides VS are Jetbrains products and I guess Xcode for iOS dev.
This is not just for primary editor. So if I use VSCode as primary, IntelliJ for Java development and vim for server side/small file changes, I'll be counted in all 3.
I think it's possible to customize it to be an IDE in some cases, but at least for some languages, it's not one out of the box. I have no idea how most people use it, but it doesn't seem obvious to me that all or most users would necessarily use it as and consider it an IDE.
Well, out of the box, it really only supports JavaScript and TypeScript - and those two are at the level I'd consider to be an IDE (i.e. with debugging etc). Any other language requires an extension. But most major language extensions also provide a full suite of IDE services. Although sometimes that is spread across several different extensions - as with e.g. Java - but in that case, there's usually also an extension pack that gives you the unified experience.
