Terraform workspaces are one of the most misunderstood features in Terraform.
Many engineers assume a workspace creates a separate environment. The reality is much narrower. A workspace selects a different state file while using the same configuration. The code remains unchanged.
That distinction becomes important when resource names depend on terraform.workspace. A workspace can change where infrastructure is created without changing the underlying code. A simple workspace selection mistake can place valid resources in the wrong location.
The lesson also examines why workspaces do not separate AWS credentials. State isolation and account isolation are different problems. A production account can still be affected if the provider configuration points to production resources.
Additional topics include conditional resources, backend naming, state collisions, workspace validation, and the practical limits of workspace-based designs.
By the end of the lesson, the focus shifts from Terraform syntax to operational boundaries. The most common workspace failures are not caused by code. They are caused by treating state selection as environment separation.