Describe a scenario where using the vendor directory would be beneficial over relying solely on Go Modules.

Using the vendor directory can be beneficial when you need to ensure reproducible builds with specific dependency versions. In this scenario, you can vendor (copy) the dependencies into your project's vendor directory and commit them to version control. This way, you have control over the exact versions of dependencies used in your project, which can be crucial for stability and compliance in some situations. Relying solely on Go Modules may automatically update dependencies, potentially leading to compatibility issues.