In an enterprise where a product is being developed, we find lots of developers on different teams working with different repositories but in the same Git-based VCS.
Here in CodeCommit, if we give a user CodeCommitPowerUser access, then the user will have full control over all the repositories, except the deletion of repositories. So, a Power User will be able to see the source code of all other repositories, that is, there won't be any privacy. This is the kind of permission you should avoid giving another user.
In some companies, they have different use cases, for example, they only require a few of their developers to have access to all Git-based commands and on the specific repository. We dive into how to implement this type of scenario.