[shadycuz]

I can think of a couple use cases.

1. You started on AWS using Cloudformation and now your branching out to other cloud providers and you want to use a cloud agnostic IaC tool.

2. Your company uses Terraform but you come across a rouge team that used Cloudformation.

3. Your company uses Terraform and your about to deploy X but you cant find any Terraform starter code but you do find an AWS quick start.

4. You started with Cloudformation but later discovered Terraform and now you want to migrate everything.

[shadycuz]

Okay so all of these are centered around unifying everything to Terraform. That's pretty much it's only use case.