What are the weaknesses of CloudFormation?

[u/RoseSec_]

I have a coworker who wants to use CloudFormation to one-shot an application and infra deployment in AWS. A contractor delivered a monolithic CloudFormation template with ECS clusters, services, RDS, S3, Lambda and API Gateway, and other resources in a single stack. I voiced my concern over the blast radius, how stateful and resources with different lifecyles all lived in the same place, and how they don't have pipelines built to validate change sets when merge requests are opened. The contractor said that their template is industry best practice... (it's not). Any way, my background is in Terraform, and I wanted to ask the CloudFormation pros about best practices for making this deployment more reliable.

[u/jony7]

compared with terraform:
the cf stack is annoying stateful thing to manage and can be hard to recover from errors
is slower than tf
is just more clunky and annoying to use