Another consideration is the release of new features. You use ARM templates, that support comes with a feature GA. Terraform has to wait for the updated GO SD

Another consideration is the release of new features. You use ARM templates, that support comes with a feature GA. Terraform has to wait for the updated GO SDK, and then you have to wait for them to build it into Terraform. Bicep in theory carries a similar risk, but I have not heard any complaints so far. Maybe product teams release ARM and Bicep functionality at tbe same time?