From Terraform to OpenTofu: A Migration Guide
· via StackGuardian
Summary: The licence change forced a decision on every platform team, and OpenTofu is close to a drop-in replacement from some Terraform versions and a diverging fork from others. Match the migration path to your starting version; from 1.9.x there is a defined, reversible sequence. Check provider and module compatibility first, and decide the rollback plan before you migrate.
Who should read it: platform teams still on Terraform and weighing a move, especially with a large multi-team estate where a botched cutover is expensive.