Terraform is so good and popular, and community developed so many various providers for it, that it's suitable not only from Infrastructure as a Code (IaC), but also for configuration management. For example, with Zabbix provider, you can almost completely control that monitoring tool, and with Azure DevOps provider, it's possible to offload the control over CI/CD tool into Terraform code!
As a result, Terraform configurations increasing in size, using many different tricks, code practices, etc., that it's becoming necessary to look over TF files in automation mode, i.e. to test Terraform code against errors and styles.