It's not about forcing everyone to use the same IDE. It's about making sure that there's at least one IDE that everyone can use.

Over time, engineers realize that Code Search is more important than their IDE.

Some of the most productive engineers I know at Google are proud (and adaptable) VIM users, always have been, and nobody is going to tell them they should use anything else. They're also just fine with AI tooling, and fit it right into their VIM workflows.