The only thing that I can think of is that vscode is free and “good enough”. The integration for JavaScript and golang seems to be more “natural” in VSCode, somehow.
If you are using the free IntelliJ tools you get a crappy js editor when using the rust or Java specific IDE. Now I need to install another IntelliJ app.
Also I like being able to run vscode with a dev container. It allows new team members to instantly start working on a project and grt most things done.