I belong to a 100+ team working on the Chromium code base; a project having 150+ third party sub-projects, all tied up by and build in the command line with a few build tools like GN and ninja.

Not one in my team use an IDE because they die merely trying to index everything. Everyone uses a simple editor of choice: Emacs, Vim, VS Code and Notepad++ are the popular choices. Everyone has at least two Bash/CMD instances open.

The systems programming world is a different one unlike the web programming world where everything is small and self contained for an IDE and GUI.