One important piece of context that might make all these stories less confusing for non-googlers:

Code references are less important inside Google editors, because we have a code viewer tool inside the web browser.

Most people read, explore, follow references, and share permalinks to the view-only tool. It’s a lot better than viewing code in GitHub. It’s super fast, is connected to language servers and can actually trace referenced, and overall has a million little features optimized for reading code.

We also have a code reviewer tool, and a separate tool to run and view CI runs.

So what’s left for the editor? Syntax highlighting?

I would tend to view code, run tests and CI, and review in separate tools specialized for their specific use case. The code editor was just a place where I would type in my changes.

I’d imagine this workflow feels weird to people who learned in one-stop-shop IntelliJ and GitHub world. But I can’t emphasize how much better these other tools were compared to GitHib. So a code editor that also lets me read, review, and test code didn’t really matter for me when I had a collection of smaller tools specialized for each individual task.