Even I switch to VSCodium when I write Go, for example, because the Go extension is just so good. I use it for medium- and large-sized projects, when I have to navigate through multiple files. There are ways to do it in Vim (I configured it), and Emacs, but sometimes it really is just easier to click since I am already using the mouse for stuff. There are people who never use their mouse, in which case I can imagine they use Emacs or Vim only.