As a once-off, not much because the treemap or graph look arbitrary so it's just eye candy. But a small fast treemap in your IDE would quickly become something

As a once-off, not much because the treemap or graph look arbitrary so it's just eye candy. But a small fast treemap in your IDE would quickly become something you depend on, just like minimaps turned out to be really useful to enough people that they become a default in vscode.